If you have upgraded from Windows 7 to Windows 10, you may find that some of your Office 2013 documents result in errors when you try to open them in protected view using a Click-to-Run install of Office. Protected View can occur when opening files from locations that may pose a threat such as Outlook or the internet.
- Excel: "This file is corrupt and cannot be opened"
- Word: "Word experienced an error trying to open the file"
- PowerPoint: "Sorry, PowerPoint can't read <file name>"
For more on Protected View, refer to https://support.office.com/en-us/article/What-is-Protected-View-d6f09ac7-e6b9-4495-8e43-2bbcdbcb6653?CTT=1&CorrelationId=e345befc-508c-4b7d-9e6e-1ca7115fed91&ui=en-US&rs=en-US&ad=US
This issue is being investigated. The KB article below includes steps to resolve the issue:
Error opening Office documents after upgrading to Windows 10
You may have seen forum posts or third-party content that recommend disabling or bypassing Protected View to prevent this issue. We strongly discourage this step as a resolution.
This issue has not occurred with MSI Office installs or with upgrades from Windows 8.1.
Additionally, if your files are blocked but you are getting a Windows Security type of message, check out this blog as a possibility:
Blocked Access to files with Windows 10