Can you add anymore context?  When does this error happen? Are you running stand alone or on a network?

Started today. Anytme you log on to a client and try to do anything you get this message. 

https://proconnect.intuit.com/community/multi-user-mode/help/uninstall-rename-and-reinstall-proserie...

You could futz around trying a bunch of fixes, but Im betting you'll wind up here anyhow.