last week my computer crashed, i was unable to get windows to boot up so i took in in to a repair shop. apparently i had a virus or something which had corrupted windows. anyway, the tech shop got it back up and running fine, except for one thing i just noticed. my cpu(amd athlon xp3000+), which was running @ 2.2Ghz, is now only running @ 1.29Ghz. Any ideas? i don't want to take this thing back to the shop again.