We work to find the issue that may comes up when anyone is using Office with Windows 10. In the meantime, please use the following workarounds to fix the problems.
Office documents open slower after Windows 10 Fall Creators Update
In Windows  Fall Creator Updates, the active Antivirus product can dynamically scan microsoft Office documents via the Antivirus API for Office when you open them. This helps the active Antivirus product to detect malicious documents that obfuscate malicious content by employing techniques like document encryption. This scanning occurs with all versions of Office documents and could result in a delay of up to an second per document.

Microsoft is investigating this issue and will post an update here once the issue is resolved. For more information on this new behavior, see
You can not find Office applications after Windows 10 upgrade
Windows 10 does not pin the Office apps to the Start menu or the Taskbar by default, but there are a few ways to find and open Office applications from the Start screen and taskbar in Windows 10.
For more information, see
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