I hope someone can help me with this as im on the verge of tearing my hair out. I am on a recently re-formatted PC running Windows Xp (service pack 3). My problem is that windows just locks up its programs every few hours. Firstly it starts with Firefox where it refuses to browse the internet (it stays on the: "looking up website" phase of opening a website forever), and then everything becomes incredibly laggy and when i try to access other software on my taskbar, it wont even open the window. The start menu refuses to open too. During which time i do a control alt and delete and the task manager window refuses to display even though i can see the cpu usage % display it has in the quick launcher part of the task bar (near the clock). This then forced me to restart via the main power button. It has happened 6 times today alone and its really making me angry. Any thoughts??? Edit: I've considered it might be a virus, problem is none of my scans are able to finish before everything locks up again.