I don't think that this is a Windows problem. I have at home a network with 60 people, and I have reinstalled my Windows wich is XP with SP1, and I have noticed that my cpu was staying at 100%. That was very suspicious because I didn't had any application started or window, so I looked at the system processes an I saw a process with a very strange name. I've stopped that process and the cpu was back to normal (2-4%). But after aproximately 10 min. it started again : cpu 100% !! I said this can't be true, so I looked again in the processes tab and I saw a new process with a new strange name, and I said: this is a worm !! I have to say that I've took this worm from my network because the sistem was alright before I plugged the network cable at the pc. And once the network cable was plugged into my pc I got infected ( I know this because I have reinstalled my Windows for 4 times in the same day !! ). I don't know what to do, because I've used an small clean utillity named KorgoCleaner wich have found the korgo worm and it deleted it. But the problem didn't dissapear, it's even worse now... Now, I have to close the explorer.exe process and runnit again to get my cpu work fine. I am sure that this is an worm. PLEASE GIVE ME SOME HELP !!! AND DON'T TELL ME TO GET THE LATEST XP UPDATES, I ALREADY DID THAT !!! AND MY HARDWARE IS WORKING PROPERLY !!! AND DON'T SAY THAT IS AN HARDWARE PERFORMANCE THING BECAUSE I HAVE 1024 MB RAM DDR 400 AND A NFORCE 2 MB WITH A AMD ATHLON XP 2400+ CPU !!!