Hi,
Is this problem just occures when opening excel file? How about other office program?
Did you make any change to your Office, such as install language package, etc. that may cause this problem?
Since your problem is specific with Office program, it would be better to provide your question at Office Forum.
https://social.technet.microsoft.com/Forums/office/en-US/home?forum=officeitpro
Roger Lu
TechNet Community Support
