Hi,
I want to confim that whether the issue occurs in only this file or occurs in all files?
Check to whether there are any macros to cause this issue.
Also, try to open the file in safe mode to check the issue.
About safe mode, please refer to the link:
http://office.microsoft.com/en-us/excel-help/work-with-office-safe-modes-HP010354300.aspx?CTT=1
The last option is if the issue occurs in only this file, then copy the content into a new document to check the issue.
Jaynet Zhang
TechNet Community Support
