HELP! I am having trouble with my PC: I just did a fresh reinstall of Windows XP Pro, and updated drivers and all Windows updates. Now my problem is this: Over a bit of time (ie: 1-2 hours), the computer will run progressively slower and slower. Even webbrowsing on this relatively powerful machine becomes a difficult task! I do not understand why this is happening, since I have only reinstalled in the last 24 hours and do not have many programs on here. When I restart/reboot the machine, it returns to its normal speed, but give it some time and then it happens again! I have not noticed any abnormal tasks running, and so far have not detected any Trojans. I am almost thinking that it could be a memory leak since I had to replace my power supply the other day because it calved on me. BTW: Its XP Pro, all updated, with SP1 and all that jazz...thx

run taskmanager see what is using all ur cpu.check it out and post again.I need more info to help u out.

When idle, there are usually only about 20 processes or less running, which do not take up very much memory. However, the longer the computer sits; the CPU usage will be bad. For instance, after a fresh reboot the cpu usage at idle is like 1-5%... after a few hours, it is constantly 90-100% usage - even when doing nothing! What is going on here? thx

u should check if explorer.exe is cousing this.(run task manager) do u have other partitions on your disk? i think a bad or corrupt file is cousing this.(in one of your partitions) for example a file you've downloaded but couldn't open.a .avi file maybe? anyway your drive c is not the problem since you've done a clean install. it's the other partition i'm thinking of.(if u have any) if it's a bad file delete it .u might have problems deleting it under windows if so start your computer with ms dos and delete the file.