Embalmer
I just found this fix on another forum, during a Google search. it worked perfectly for me.
click on Start, Run and type the path of winword.exe which is usually
"C:\Program Files\Microsoft Office\Office\WINWORD.EXE" /unregserver
Then do that again with
"C:\Program Files\Microsoft Office\Office\WINWORD.EXE" /regserver
and this will stop the problem. do the same thing, but for the "EXCEL.EXE" executable, and it will fix the problem in Excel, too.