Excel files will not open

Copper Contributor

SuddenlyTI cannot open any of my excel files.  I unistalled-reinstalled MS office but that did not help.  I googled for suggestions but nothing works.  Every time I try to open an excel file I get the message "select an app to open this .xlsx file." My files are stored in icloud.  Excel only wants to open files stored in one drive.


Would appreciate any suggestions.


2 Replies


It sounds like your file associations for Excel may have become disassociated or are not set correctly. This can lead to Excel not automatically opening .xlsx files when you try to open them. To resolve this issue, you can reset the file associations for Excel. Here's how you can do that on a Windows computer:

  1. Set Default Programs:
  1. Click the Start button or press the Windows key on your keyboard. b. Type "Default apps" and select Default apps from the search results.
  1. Choose Default Apps by File Type:
  1. Scroll down and click on the link that says "Choose default apps by file type."
  1. Set Excel as the Default App:
  1. Scroll down to the ".xlsx" file extension. b. Click on the application icon next to ".xlsx," and a menu will appear. c. Choose Microsoft Excel from the list of available apps.
  1. Test Opening a File:

Try opening an Excel file again, and it should open with Microsoft Excel.

If you're using a Mac, you can try the following steps:

  1. Open Finder.
  2. Locate an Excel file (with a .xlsx extension).
  3. Right-click (or Control-click) the file.
  4. Choose "Get Info" from the context menu.
  5. In the "Open with" section, make sure "Microsoft Excel" is selected.
  6. Click the "Change All" button to apply this association to all .xlsx files.
  7. Test opening an Excel file to see if it opens correctly.

If these steps do not resolve the issue, and Excel still does not open .xlsx files, you may want to check if there are any issues related to iCloud syncing or file sharing. Sometimes, conflicts between different cloud storage services or syncing settings can affect how files are opened. In such cases, you may need to review your file syncing settings within iCloud and ensure that your Excel files are not restricted to OneDrive only. The text was created with the help of AI.

Additionally, ensure that your Excel is up-to-date with the latest updates from Microsoft.


My answers are voluntary and without guarantee!


Hope this will help you.


Was the answer useful? Mark as best response and like it!

This will help all forum participants.


It seems like Excel is not recognizing the association between .xlsx files and the Microsoft Excel program. This can happen when the file association settings are changed or when there is an issue with the default application for .xlsx files. To resolve this issue, you can follow these steps:

1. **Set Excel as the Default Program:**
- Right-click on any .xlsx file.
- Choose "Open with" and then "Choose another app."
- Select Microsoft Excel from the list of applications.
- Make sure to check the box that says, "Always use this app to open .xlsx files."
- Click "OK" to confirm.

2. **Check Default App Settings:**
- Go to your computer's settings or control panel.
- Navigate to the "Default Apps" or "Apps" section.
- Look for the "Default apps by file type" or a similar option.
- Find .xlsx and ensure it is associated with Microsoft Excel.

3. **Check Excel File Associations within Excel:**
- Open Excel.
- Click on "File" or the Office button (the exact wording might vary depending on your Excel version).
- Go to "Options" or "Excel Options."
- In the Excel Options window, go to the "Advanced" section.
- Scroll down to the "General" section, and make sure that "Ignore other applications that use Dynamic Data Exchange (DDE)" is **unchecked**.
- Click "OK" to confirm your changes.

4. **Verify iCloud Sync Settings:**
- If your files are stored in iCloud, make sure iCloud is not causing conflicts with file associations.
- Check the iCloud settings on your computer and ensure that it's not affecting the way Excel opens files.

5. **Repair Office Installation:**
- Sometimes, issues with file associations can be caused by a corrupted Office installation.
- You can try repairing your Office installation by going to the Control Panel (Windows) or Applications (macOS), finding Microsoft Office in the list of installed applications, and choosing the repair or uninstall/repair option.

6. **Reboot Your Computer:**
- Sometimes, simply restarting your computer can help resolve file association issues.

If none of these steps resolve the issue, you might want to reach out to Microsoft Office support for further assistance. They may be able to provide more specific guidance based on your version of Office and your operating system. Additionally, check for updates and make sure you are using the latest version of Office to ensure that any known issues are addressed in the updates.

Also, let me know if the issue still persist.