you can also clear ur windows/pretech data from ur system . some annyoing hacks makin random entries and even if u dont load the hack it performs the fuckin string back into the game somehow .. i delete everything with cCleaner or delete windows prefetch cache
(after deleting the whole crap/.ini .pk3's from my etmain or whatever)
best solutiuon would be if u install ET twice . one for serious gaming and one for hacking/testing screwing arround.