Hello,
Thank you for posting your query in Microsoft Community.
You may follow the below mentioned steps.
- Close all Excel windows
- Press Windows key + R, type regedit in
Run box.
- Go to Computer\HKEY_CLASSES_ROOT.xls, right click on .xls and click
Delete.
- Click on Yes. Close Registry Editor.
Disclaimer:
To do so: Important the above method or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully.
For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft
Knowledge Base:
322756 (http://support.microsoft.com/kb/322756/ ) How to back up and restore the registry in Windows.
Once you complete the above mentioned steps repair Office suite using the following link and verify the status.
https://support.office.com/en-US/Article/Repair-an-Office-application-7821d4b6-7c1d-4205-aa0e-a6b40c5bb88b
Hope this information helps. Post back with updated issue details for further help.
Thank you.