I have Windows 8 and also had a problem where CONTROL C and CONTROL V did not always work.
In Outlook 2007 and 2010 it never worked correctly. If I CONTROL C .. then went and created a new email .. and tried to CONTROL V .. it never worked. I always had to create the new email FIRST, then go back and CONTROL C the text.. then I could CONTROL V into the email (not the most logical order !)
sfc /scannow
>> Seems to have resolved the problem. If not, I will post back here again.
It stopped working again .. Windows 8 is a piece of junk !!! I wish I could go back to Windows 7