System Restore, I know you said it is slow try anyway.
Try installing ewido
http://www.ewido.com update and do a full scan.
my windows updated last night i think... i woke up and found my computer have been restarted. as i log in everything seen fine till the programs starting when window starts up are all freezing. so i figure just close them with windows manager but no go. everything lag and freeze. only thing that works is task manager and web browser that i open from task manager. i try to run hijack log but cant do that when i cant access any drive. i try goin in safe mode to work but nothing works. please help me out =(