Soulwing

I've ran it and I didn't find any problems...

I've told that I've just reinstalled windows, so I don't have anything installed, except the Drivers.

I don't know as I said what's it problem and I'm not even sure what a malware can do. Anyway, I've runned the Anti Viruses one after other, not at the same time.

Well, I was usually turning on my PC when I saw that it was a bit laggy. I thought it was because of startup programs so I ignored it and entered in a game (Warcraft III), when I saw that I have huge un-playable lags. I thought then that it was just a virus or something so I scanned with Avast but it found nothing. Then, i've CCleaned it and verified the startup programs and such, but still nothing. I've scanned again with Avast and then with Norton and BitDefender and other softwares (malwarebytes I think) and others but the lag didn't stop. Then I checked the Task Manager and I saw the the CPU Usage was going to 100% when I was opening a folder or right-clicking desktop. I've reinstalled my windows and without installing anything (not drivers not anything) I checked again the CPU Usage and it was the same. I've checked the Processes but none were taking much usage. I've tried to run in Safe Mode, it was running a bit faster but still same CPU Usage. I've cleaned the dust within a few weeks ago so I doubd this would be the problem, and as far as I see it's not overheating. My Laptop Specs.: OS: Windows Vista Home Basic SP 2; Memory (RAM): 1 GB System Tipe: 32-Operating System Processor: Genuine Intel® CPU 575 @ 2.00GHz Someone can help?