problem´, probably gfx related or my amd processor

i recently got a trojan vundo onto my computer but cleaned it with help from the forum. about 1 week after the cleaning of the computer i formated my computer, but to my supprise all games i tried to play i was having speedhack then a huge freeze inside the game but i can still move my cursor and aim in the air/ground when i freeze.. it´s really a bugger since i formated 3 times now to get rid of it but it wont work i even tried putting bios to default and critical fail safety. nothing has worked so far. is even inside windows i can see some things like my text bar in ie7 is faster. i don't know if this is the trojan or the fact that my computer accidently got some hardware damage (took coputer to lan and might have bumped in the car). is there anyway i can search for the problem or if you might now what hardware is damaged and then tell me what i need to buy and maybe even recommend some parts i can buy cheap
my computer info is down below
amd athlon x2 dualcore 3600+
ati radeon x1650 pro 256 mb graphic card
1gb ram
250 gig hd
mother board c51gm-m
id really appreciate if u can help me out since im on the verge of buying a whole new computer since it will be to expensive to turn in computer at the local computer technician then i might aswell buy a new one or risk by buying a new motherboard and gfx card.
ps this is a repost from software section hence it fits more here then in the software section

 

You have an identical thread in the software forum and I have replied there. It's best to only have your thread in one forum so you and people trying to help don't get confused. Maybe a forum mod can close this or remove this thread, or link it to the one in the software forum.