I am also having the same issue. I did the cmd sfc/scannow and it found corrupt files that it was unable to repair. I created a new user account and the copy/paste function worked in that but of course if I delete my old user account I will lose programs I have installed. Again with the refresh option I will lose these programs.
If I choose to refresh or switch to a new user account, and then reinstall my lost programs, will the same problem eventually happen again? I believe I lost the copy/paste function after a Windows 8 update. Once this update comes around again, will the problem just return?
Please let me know if it's worth going through the trouble.
Thanks