My computer gets blocked after a couple of minutes running. When this happen I am unable to lauch anything like explorer from windows or task manager this latter appears in task tray but it is imposible to interract with it etc. I am running windows xp sp1 and I have a dsl connection. The problem occurs when I am online. I have Avast running and use spybot on a regular basis I ran an online virus scan and nothing was found, I did run SDFix from a clean startup and nothing was found neither Can you help me analyzing this please ?