Can not open excel files

When working with Excel spreadsheets, most people are either short on time or have a deadline to meet.

And it could be a nightmare if, at that point in time, Microsoft Excel decides not to open (arghhhhh!).

Unfortunately, this unexpected behavior is quite common where Excel refuses to open one of your important Excel files, or fails to open the Excel application altogether.

So, if you are suffering from the ‘Microsoft-Excel-won’t-open’ syndrome, this article is just what you need.

In this tutorial, I will cover the reasons why Excel refuses to open and the possible solutions that can help you in this situation.

So let’s get started!

Possible Reasons Why Microsoft Excel Won’t Open

Since Excel is a tool that has to work seamlessly with other applications and operating systems, there are many things that can go wrong with it.

And of course, there is always a possibility that the Excel application in itself is the problem.

Below are some possible reasons due to which Microsoft Excel won’t open on your system:

1. There is a problematic add-in that is not allowing you to open Excel files. If this is the case, most likely you will be able to open the Excel applications, but not a specific Excel file (or a new Excel file)
2. There is a possibility that your Excel application is corrupt and needs to be repaired before you can start opening Excel files again
3. Your Excel application is not able to communicate with other applications and the operating system. This has a simple fix where you can simply enable the setting and your files would start working again (covered later in this tutorial)
4. The file Association is broken which means that when you try and open an Excel file, it doesn’t know what software to use to open the file. This again has an easy fix, where you can simply reset the file associations. A lot of people who have upgraded their Excel or operating system often face this issue
5. The file that you want to open is corrupt. This often happens when someone else shares the file with you or when you copy the file to a network drive or an external drive and transfer it to your system. There’s not much you can do in this case, except to make sure that you create backups of your files in the future

How to Fix Excel Files Not Opening

Now, let’s have a look at some of the methods that you can use to fix the issue of Excel files not opening.

I’m listing these fixes in an order in which these are most likely to work.

Uncheck the Ignore DDE box

The most common and easiest fix is to make sure that the correct setting is enabled for the Dynamic Data Exchange (DDE).

DDE is how Excel interacts with other applications.

By default, the DDE setting is disabled, but in case it gets enabled by any chance, then it could lead to your Excel files not opening on your system.

When this happens, you will be able to open your Excel application from the start menu, but you won’t be able to open individual Excel files.

Below are the steps to fix this DDE issue:

1. Open the Excel file from the Start menu
2. Click the File Tab
3. Click on Options
4. In the Excel Options dialog box that opens up, click on the ‘Advanced’ option on the left pane
5. Scroll down to the General section
6. Make sure the ‘Ignore other applications that use Dynamic Data Exchange (DDE)’ setting is disabled.
7. Close the Excel Options dialog box

If this setting was enabled earlier and you have disabled it using the above steps, this was most likely the issue and it should get sorted now.

In case this method doesn’t work, keep reading!

Turn OFF Add-ins

A lot of people use third-party add-ins in Excel that allow them to enhance the functionality and be able to use many features that are not there in Excel by default.

One of the add-ins that I used to use in my full-time day job days was ‘ThinkCell’, which allowed us to create beautiful charts that were not possible with Excel itself.

And sometimes these add-ins end up being the problem where you not able to open your Excel files.

It has an easy fix – disabling the add-in.

Below the steps that you can use to disable an add-in in Excel:

1. Open the Excel file from the Start menu
2. Click the File Tab
3. Click on Options
4. In the Excel Options dialog box, click on the Add-ins option in the left-pane
5. At the bottom of the dialog box, click on the Manage drop-down
6. Click on COM Add-ins
7. Click on Go
8. In the COM Add-ins dialog box that opens, disable all the add-ins
9. Click Ok

Now try and open an Excel file that wasn’t opening earlier. If the item was the issue, the file should open now.

Many a time, it’s a one-off issue and the add-in will work perfectly even if you enable it now. In case you enable the add-in and you still face the same problem, you can be sure that the add-in is corrupt I need to be permanently disabled.

Repair Microsoft Office

Another possible reason that causes Excel files to not open could be that your Microsoft Office application is corrupt and need to be repaired or reinstalled.

But since reinstalling is a little more work, let’s try the repair option first.

Follow the steps below to repair the Microsoft Office application on your system:

1. Hold the Windows key and press the R key. This will open the ‘Run’ dialog box
2. Enter the following text in the run box – ‘appwiz.cpl’. This will open the programs and features dialog box
3. Locate Microsoft Office in the list
4. Right-click on the Microsoft Office option and click on Change (in case you see the repair option right here, click on it)
5. In the dialog box that shows up, click on the Quick Repair option
6. Click on the Repair button

Follow through with the steps that show up and within a few minutes, it will repair your Microsoft Office application.

If a corrupt Microsoft Office application was the issue, it should be fixed with the above steps.

But in case you’re still not able to open Excel files, let’s try more fixes.

Reset Excel File Associations

File Association is what makes sure that when you open an Excel file, it uses the Excel application to open that file.

And sometimes, these file associations go wrong and when you click on an Excel file, it would not know that it needs to use the Excel application to open it.

The fix – resetting file associations

Below are the steps on how you can do this:

1. Open the Control Panel
2. Click on Programs
3. Click on Default Programs
4. Click on ‘Set your default programs’
5. In the Default apps windows that opens, scroll down to the ‘Reset to the Microsoft recommended defaults’ and click on the Reset button.

If a mismatched file association was the issue that was not letting your Excel files open, this would fix it.

Note that since we have reset the default for all the applications on your system, in case you had manually made any changes and specified any specific file extension to be opened with a specific application, that would also be set to the default.

If you don’t want to reset the default for all the applications and only for the Excel files, click on the ‘choose default applications by file type’ option.

In the screen that shows up, locate the Excel files extensions (.xls, .xlsx, .xlsb, .csv, etc.) and set XLS the default application for these.

Disable Hardware Graphics Acceleration

Hardware graphic acceleration is something that helps your system perform better, especially when using Microsoft Office applications such as MS Excel or MS Word.

But many times, this may also lead to your Excel files not opening or your system or files crashing.

So, if everything else fails, it’s worth trying this method.

Hardware graphic acceleration is enabled by default and disabling it can solve the issue.

Here is how you can do it:

1. Open the Excel applications
2. Click on the File tab
3. Click on Options
4. In the Excel Options dialog box that opens up, click on the Advanced tab in the left pane
5. Scroll down to the ‘Display’ settings
6. Check the – ‘Display hardware graphic acceleration’ option
7. Click OK

If hardware graphic acceleration was the issue, your Excel files should start opening now.

When Everything Fails – Reach out to the Microsoft Support

And finally, there is only so much troubleshooting you can do.

If nothing else has worked for you so far, it’s best to reach out to Microsoft support and see if those guys can help you.

Many times, these issues could also arise from some recent update that Microsoft released which may have inadvertently caused this issue.

You can use the below link to contact Microsoft support:

https://support.microsoft.com/contactus/

Another thing you can try is posting your query on many active Microsoft forums, and the awesome folks of the Internet may come to your rescue.

I know that this is not an ideal solution, but it can help you get feedback and solutions from experts, which is helpful in almost all cases.

So these are the methods that you can use to troubleshoot when your Microsoft files won’t open.

In most cases, it should be sorted by simple setting changes such as disabling third-party add-ins or resetting file associations, and in some rare cases if you’re not able to identify the issue the best thing is to reach out to Microsoft support.

I hope you found this tutorial useful.

Other Excel tutorials you may also like:

• How to Automatically Open Specific Excel File on Startup
• Excel Formulas Not Working: Possible Reasons and How to FIX IT!
• 10 Tricks to Fix Slow Excel Spreadsheets (Speed-up Excel)
• #REF! Error in Excel – How to Fix the Reference Error!
• How to Recover Unsaved Excel Files [All Options + Precautions]
• Arrow Keys not Working in Excel | Moving Pages Instead of Cells
• Excel Tabs/Sheets Not Showing – How to Fix?
• How to Mark an Excel Workbook as Final?

When you try to open an Excel workbook, a Word document or a PowerPoint presentation with Excel, Word, or PowerPoint, the following errors may occur:

• The file doesn’t open in the expected application. For instance, an Excel workbook doesn’t open in Excel 2019; instead, it opens in another app or an older version of Excel.

• An error indicating a file association problem may occur. For instance, you may get an error similar to “This file does not have a program associated with it for performing this action. please install a program or if one is already installed create an associate in the default programs control panel«

  -or-

  “This action is only valid for products that are currently installed”

Run a Quick Repair to fix the file association problem

1. Click the Start button

   Note: If you’re using Windows 7, just click Start > Control Panel then you can skip to step 3, below.

2. Type and choose «Control Panel»

3. Choose Programs > Programs and Features.

4. Next, select the Office product you want to repair and then choose Change.

5. Choose the Quick Repair option and then choose Repair.

For more information about the repair option in Office, go to Repair an Office application.

If that doesn’t resolve the issue try manually associating the files to the correct app.

1. Click the Start button

   Note: If you’re using Windows 7, just click Start > Control Panel then you can skip to step 3, below.

2. Type and choose «Control Panel»

3. Click Default Programs (if you don’t see Default Programs, type it into the search box at the top right corner of the window and press enter)

4. Choose Set your default programs

5. Select the Office app that isn’t opening correctly and choose Set this program as default.

6. Click OK

Tip: You may want to repeat this process for the other Office apps while you’re here.

If you have multiple versions of Microsoft Office…

Consider uninstalling the versions you don’t need. To do that:

1. Click the Start button

   Note: If you’re using Windows 7, just click Start > Control Panel then you can skip to step 3, below.

2. Type and choose «Control Panel»

3. Choose Uninstall a Program and select the version of Office you want to remove.

4. Click Uninstall.

5. Restart your computer.

Having too many versions of Office on your computer can cause issues, including files opening in the wrong version of Office.

Tip: In some cases you’ll get your best result by uninstalling ALL versions of Office, then reinstalling just the version you want.

If all else fails..

You should still be able to open your file by opening the application first, then opening the file from there. To do that:

1. Start the program needed to access your document; Word, Excel or PowerPoint

2. When the program opens, click File > Open, find your file in the file navigator and open it.

Still have a question about Office?

Visit the Microsoft Answers Community to see questions and answers posted by others or get answers to your own questions.

We’re listening!

This article was last updated by Ben on May 9th, 2019 in response to your feedback. If you found it helpful, and especially if you didn’t, please use the feedback controls below and leave us some constructive feedback so we can continue to make it better.

See Also

Recover your Office files

Open a document after a file corruption error

If tweaking the program’s settings fails, run an expert Excel repair tool

by Milan Stanojevic

Milan has been enthusiastic about technology ever since his childhood days, and this led him to take interest in all PC-related technologies. He’s a PC enthusiast and he… read more

Updated on November 25, 2022

Reviewed by
Alex Serban

After moving away from the corporate work-style, Alex has found rewards in a lifestyle of constant analysis, team coordination and pestering his colleagues. Holding an MCSA Windows Server… read more

Microsoft Excel users have reported issues with the program with regards to Excel not opening files.

If you’ve had a similar experience, you’ve probably noticed that when you try to double-click on an Excel file or an icon for a workbook, the program starts up but you get a blank white screen instead of the intended file.

Some users have circumvented this issue by using this path File > Open > Workbook. But it’s much easier to just double-click, right?

However, the issue, as described by Microsoft Support, arises from the fact that Excel got a security upgrade such that there are changes in the behavior of certain types of files in the way they open in Excel.

This change, as explained, came with three security updates: KB3115322, KB3115262, and KB3170008.

Unlike the former times when you would try to open HTML or XLA files with an Excel .xls extension, the program would caution over the disconnect between the file and contents but open without Protected View security.

After these updates, the program will not open workbooks but will show a blank screen instead.

It doesn’t even warn you that it did not open the file.

What do I do if Excel doesn’t open files?

In this article

• What do I do if Excel doesn’t open files?
• 1. Uncheck the ignore DDE option
• Fix Excel file not opening by unchecking the ignore DDE box
• 2. Reset file associations to fix Excel file not opening
• 3. Fix Excel file not opening by repairing the program
• 4. Turn off add-ins to fix the Excel file not opening error
• 5. Disable Hardware Graphics Acceleration if Excel won’t open files

Excel file not opening cases are more common than you think. Even more common is for the issue to happen because the files you may be trying to open are incompatible with the Protected View feature.

Don’t worry, we have prepared some quick-fix solutions you can use to resolve Excel file not opening issues, and keep on using the easy way to access your workbooks by double-clicking them.

1. Uncheck the ignore DDE option

Fix Excel file not opening by unchecking the ignore DDE box

One of the reasons your Excel program is not opening files may be caused by the Ignore other applications that use Dynamic Data Exchange (DDE) option selected.

The function of the DDE is to send a message to the program once you double-click, which then instructs it to open the file or workbook you have double-clicked to open.

1. Open Microsoft Excel.

2. Go to File in the top left corner of the screen.

3. Click on Options.

4. Select Advanced from the menu.

5. Navigate to the General tab.

6. Uncheck the Ignore other applications that use Dynamic Data Exchange (DDE) box.

7. Click Ok to apply and save the changes.

8. Check if you can open the desired Excel file.

Note: if you select Ignore, Excel ignores all DDE instructions sent from other programs to itself, thus it will not open the workbook you have double-clicked.

You can fix this issue and open hundreds of other file formats with a single application.

File Viewer Plus is a universal file viewer for Windows that can open and display over 300 different file types, with support for Word, PowerPoint, Excel, Visio, and Project files.

Then if you want to resolve this issue using useful Windows file viewer software, have a try now with File Viewer 4 Plus.

You can download it for free from the official website or buy it at an affordable price.

2. Reset file associations to fix Excel file not opening

1. Right-click the Start button.
2. Select Control Panel.
3. Click Programs then click Default Programs.
4. Under Default Programs, click the Set your default programs. A search process will begin to find your default programs.
5. From the list of default programs, choose Excel.
6. Now, click on Choose default for this program.
7. The Set Program Associations screen will open up. Click Select All.
8. Click Save which sets off the saving process and OK.

You’ll need to reset the Excel file associations to default settings, and here above are the steps to follow.

3. Fix Excel file not opening by repairing the program

1. Right-click the Start button and select Control Panel.
2. Click Programs and select Uninstall Programs.
3. Now, click Microsoft Office and select Change.
4. Finally, click Online Repair, then select Repair.

Sometimes the only other solution would be to repair your Microsoft Office programs. Here’s how to go about this.

Once you do the above, reboot your computer.

4. Turn off add-ins to fix the Excel file not opening error

There are two types of add-ins that can cause the Excel program not to open files. These are:

• Excel add-in
• COM add-in

These add-ins need to be turned off one after the other if you have to test, disable and isolate the issue, and here’s how to go about it:

1. Open Excel program
2. If it opens a new workbook, go to File.
3. Click on Options and select Add-Ins from the left pane.
4. Locate Manage at the bottom of the open screen.
5. On the drop-down, select COM Add-ins and click Go.
6. From the open box, clear one of the add-ins on the list and click OK.

Once all these steps are followed, restart the Excel program by double-clicking on a file or icon of the workbook you want to open.

Note: in case the problem recurs, repeat the first seven steps, then choose a different add-in to clear, and try this as you go along.

If it opens, then you’ll know the add-in you selected last is the one causing the issue. Then, you can find an update or newer version of the add-in from the manufacturer’s website, or turn it off if unavailable.

Read more about this topic

• 0x80020010 Windows Update Error: 4 Ways to Fix It
• AMDRSServ.exe: What Is It & How to Fix It in 7 Easy Steps
• The 2023 April Patch Tuesday comes with fixes for 97 CVEs
• Windows 10 & 11 April Patch Tuesday [DIRECT DOWNLOAD LINKS]

5. Disable Hardware Graphics Acceleration if Excel won’t open files

1. Open the Excel program and go to File.
2. Now, click Options and select Advanced.
3. Find the Display tab. Then, locate and check the Disable hardware graphics acceleration box.
4. Click OK and you should be done.

Follow these steps to disable hardware graphics acceleration and let us know if you managed to fix the Excel file not opening issue by doing so.

If none of the above solutions worked, then contact Microsoft Support for further options.

Did any of these solutions work for you? Share with us in the comments section.

MS Excel is an important application that many companies use to manage their data and customer information. Sometimes, when you open an Excel file by double-clicking it, you land on a grey or white blank screen. Simply put, you do not see the file’s content you opened. This means that the Excel file you are trying to open will not open. Many people worldwide face this issue even after opening and closing the file multiple times. The major reasons for this issue include:

• The file might be corrupted.
• Incorrect file extension.
• The file is already open in some other program.
• Problematic Add-ins.

Whatever the reason, if you face the same issue and want to access your Excel file, this article will present the best ways to fix the «Excel files won’t open» issue. Give a read to it and try out the proposed methods; your issue will be resolved in no time!

Are you trying to open your Excel file but do not see the file contents? Are you unable to open an important file that you need to access immediately? If yes, here is what to do!

Part 1: How to fix «Excel won’t open file in Windows 10/11» issues?

Fix 1: Uncheck the Ignore DDE Box:

The Dynamic Data Exchange (DDE) settings determine how Excel interacts with other applications. You may face this issue when this setting is enabled, as it does not let the Excel files open. You can access the MS Excel application from the Start Menu but won’t be able to open the individual Excel files. You can resolve «Excel file not opening» problems by simply unchecking the Ignore DDE box as follows:

• Open MS Excel and go to the File Menu and click on Options:

  

• Go to Advanced settings.

• In the General group, uncheck the «Ignore other applications that use Dynamic Data Exchange» box.

  

• Click OK to save and close settings.

To open the Excel files, it is necessary to uncheck the ignore DDE box, as Excel will ignore all the DDE instructions sent from other programs if checked. This is the simplest, easiest, and most common solution to the «Excel files won’t open» problem.

Fix 2: Reset Excel File Associations:

File associations for any file are used to ensure that the file opens in the corresponding application. If the Excel file has incorrect associations, it won’t open. Repairing MS Excel won’t help much in resolving the issue, so you will have to reset the Excel file associations by following these steps:

• Open the Control Panel and click on the Programs link:

  

• Go to Default programs and click the «set your default programs» link:

  

  
• Find Excel from the list and click on it.

• Click the «Choose default for this program» link.

  

• When the Set Program Associations screen appears, check the Select All box and click Save and OK to save settings.

  

Excel file associations have been reset successfully. You have fixed the issue due to which your Excel files won’t open.

Fix 3: Repair Microsoft Office:

Sometimes, the issue is not with the file but with the MS Office, due to which Excel files won’t open. When this is the case, the issue is quickly resolved by repairing MS Office. Here is how you repair MS Office:

• Open the Control Panel, go to Programs and click on Uninstall a program link under it.

  

• Look for Microsoft Office in the list of programs and right-click on it.

  
• From the drop-down menu, click on Change.

• Choose Online Repair and click the Repair button.

  

Microsoft Office will take some time to repair the applications. Once done, all the bugs and issues will be automatically resolved, including Excel crashes when opening files, and all the Office applications will run smoothly. Do not forget to restart your PC after the repair has been completed.

After trying the above methods, you will be able to open the Excel files without Excel being crashed or any file refusing to open. Now that you know how to resolve the Excel file not opening problem, let’s look at the solution for another problem many people face, i.e., being unable to open a password-protected Excel File.

Part 2: How to Open a Password Protected Excel File?

In the above discussion, we saw what to do when an Excel file doesn’t open, but what if the file opens but is password-protected, and the password is unknown to you? Sometimes, we do not open the password-protected files for so long, and when we open them, we realize that we forgot the password. What to do in such a situation? Many people end up deleting the file as it seems impossible to recover it, but you do not need to do that in the presence of PassFabs’s Excel Password Recovery tool.

PassFab for Excel:

PassFab for Excel is an Excel password recovery tool that lets you access your Excel files without needing to enter the password. This tool removes the password from the Excel files without damaging any data in the file within the shortest time possible, regardless of password complexity. Here is how to use PassFab for Excel tool:

• Download, install and open PassFab for Excel on your PC.

• Click on the «Recover Excel Open Password» option:

  

• Upload the password-protected Excel file by clicking the + (Please import Excel file) button.

• Choose the mode of recovery and click the Recover button.

  

• Let the software recover the password. The process may take some time as it will try different password combinations. Once completed, the password will be displayed on the screen.

  

You can now copy the recovered password and use it to access the locked file. This is the best tool available for Excel password recovery.

Final Words:

MS Excel is a widely used application as it is the best yet simple tool developed by Microsoft to manage data and perform calculations upon it. Sometimes, the Excel files refuse to open due to some bugs and errors. When you double-click on it, MS Excel opens, but the file is not displayed, or Excel crashes when opening files.

In this article, we have addressed the Excel file won’t open problem. You will find different methods to resolve the issue. Besides this, you will also find the best solution to open a password-protected Excel file, i.e., PassFab for Excel, if you lose your password. PassFab for Excel is the most efficient tool to recover Excel passwords as it does not damage any data and has a 100% success rate. We hope you found this article helpful. Thank you for reading!

COMMENT

Several Microsoft Excel users have reported encountering the ‘Excel file not opening’ error when opening their Excel file. There are several reasons that may cause this error. In this post, we’ll be discussing the reasons that may lead to the ‘Excel file not opening’ error and the top 5 ways to fix this error.

Why Does the ‘Excel File Not Opening’ Error Appear?

Following are some possible causes that may result in the ‘Excel file not opening’ error:

1. There may be a problem with an add-in that is preventing you from opening the Excel files.
2. There’s a chance that your Excel application is faulty.
3. Your Excel program is unable to communicate with other programs or the operating system.
4. The file association might have been broken. This is a common problem faced by users who have upgraded their Excel application or operating system.
5. The file you’re trying to open is corrupted.

5 Ways to Fix Excel File Not Opening Error

Let’s explore the ways to resolve the Excel file not opening error:

1. Uncheck the Ignore DDE Checkbox

Dynamic Data Exchange (DDE)allows Excel to communicate with other programs. The Excel error may occur due to incorrect DDE settings. You need to ensure that the correct DDE configuration is enabled. Follow the steps provided below:

• Launch your MS Excel file.
• Go to File > Options.

• Now click on Advanced.

• Further, find the General option on the screen. 

• Uncheck the option ‘Ignore other applications that use Dynamic Data Exchange (DDE)’.
• Click OK to save the changes.

2. Reset Excel File Associations

When you launch your Excel file, the file association ensures that the Excel application is used to open the file. You can try to reset these associations and see if Excel opens after this. Proceed with the following steps to do so:

• Navigate to Start Menu and launch Control Panel. 
• Now, navigate to Programs > Default Programs > Set Your Default Programs.

• A new window will open. Herein, find the Excel program in the list and select it. Now, select the option ‘Choose defaults for this program’. Click OK.

• A new window for ‘Set Program Associations’ will open.
• Check the box against the ‘Select All’ option.
• Further, click Save to reset the Excel File Associations settings.

3. Disable Add-Ins

Many people install third-party add-ins to enhance the application’s functionality. Sometimes, these add-ins can create an issue. Follow the below-mentioned steps to disable the problem creating add-ins:

• Launch MS Excel application.
• Navigate to File > Options > Add-ins.

• In the window that opens, go to the Manage option at the bottom.
• Herein, select the COM Add-ins option from the dropdown list. Click Go.

• In the COM Add-ins window, uncheck all the boxes to disable the add-ins. Click OK.

4. Repair MS Office Program

Sometimes the issue is not with your Excel file. Instead, the reason for the error can be a corrupt MS Office application. You can repair the program to fix the Excel file not opening error. Here are the steps:

• Press the Windows + R keys to launch the ‘Run’ dialog box.

• Enter the text ‘appwiz.cpl’ to launch the program and features window.

• Find the MS Office program in the list of applications.

• Right-click on it and select Change.

• In the new window, select the Quick Repair radio button. Click Repair.

• Follow the on-screen instructions to repair the Office application. Once the repair process is completed, you can try opening the Excel file to see if the problem is resolved.

5. Disable Hardware Graphics Acceleration

The hardware graphics acceleration assists in the system’s better performance, especially when you use MS Office applications, like MS Excel or Word. Sometimes, this causes the Excel file not opening issue. You can disable this option to try to resolve the issue. Here are the steps:

• Launch your MS Excel application.
• Navigate to File > Options > Advanced.
• Herein, go to the Display option.
• Uncheck the Disable hardware graphics acceleration checkbox. Click OK.

What If These Solutions Do Not Work?

If you have applied all the methods mentioned above and still cannot open your Excel file, there are chances that your file is corrupted. You can use a specialized Excel repair tool, such as Stellar Repair for Excel to repair the corrupted Excel file. This software has powerful algorithms that can scan and repair even severely corrupt Excel files, without any file size limitation. After repairing the file, it restores all the data, including tables, charts, rules, etc. to a new Excel, with 100% integrity.

To know how the software works, see the video below:

Conclusion

Before you proceed with resolving the Excel file not opening error, try to find out the root cause of this error. If you know the real reason, you can try the method right away. If the reason for the error is corruption in the Excel file, the best option is to repair the file using a professional Excel repair software, such as Stellar Repair for Excel.