Completed a Windows 10 upgrade and now your Office documents won’t open? How to fix that.–PC Pitstop.
Office Docs Not Opening After Win10 Upgrade
by Anand Khanse for The Windows Club
Office documents do not open
You may receive one of the following errors:
Word experienced an error trying to open the file
This Excel file is corrupt and cannot be opened
The application was unable to start correctly, PowerPoint found a problem with the file or PowerPoint can’t this read.
This is happening because Microsoft Office is trying to open an Outlook attachment from untrusted locations in Protected Mode, and failing. In such cases it is not recommended to disable Protected View. Protected View help keep your computer secure & safe. Files from the Internet and from other potentially unsafe locations can contain viruses, worms, or other kinds of malware, which can harm your computer. To help protect your computer, files from these potentially unsafe locations are opened in Protected View.
If you receive such errors, KB3086786 suggests the following:
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