microsoft office background task handler flash popup

[JackHuman]

I have the same problem, but Microsoft's tech support have not helped me, because there is Office Pro Plus for student in my PC. This problem started with one of latest updates of Office. I hope that Microsoft will fix it.
P.S. Excuse me for my English)

[Rolando]

Try to run ccleaner and reg cure pro, when you run ccleaner all tmp files will be clean, actually i did it 10 minutes ago and i dont see that message again also how somebody says dissable msoffice <crtl+shift+esc>

[Michael McAllister]

On 6/8/2017 at 3:04 PM, Rolando said:

Try to run ccleaner and reg cure pro, when you run ccleaner all tmp files will be clean, actually i did it 10 minutes ago and i dont see that message again also how somebody says dissable msoffice <crtl+shift+esc>

 

You really shouldn't use CCleaner.  It will cause more problems than it solves.  In a recent update for Microsoft Office, this particular issue was patched.  If you force a manual update, the issue should be fixed for you.