Hi,
Did you see the error message right after you log onto your Windows, or while trying to open a file?
Which version of Microsoft Office do you use? Can you still see Microsoft Office listed under Control Panel > Programs and Features?
If Office is listed in Control Panel, we can first try to run a repair of your Office installation and see whether this issue continues. For your convenience:
https://support.office.com/en-us/article/repair-an-office-application-7821d4b6-7c1d-4205-aa0e-a6b40c5bb88b
Hope this helps.
Regards,
Steve Fan
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