Just over the past few days, my poor laptop hasnt been very well. I was using internet/msn one night and the screen went completely blank except for my desktop background, and my clock/stickynotes/calendar thing on the far right. Not knowing how to fix it i waited a while, then switched off my laptop. I switched it back on again and thats where the problems started, just to get on the internet right now its took me little under 3 hours to get it started up and working, as its so slow and keeps crashing. Im getting the little (not responding) thing a lot, which is really annoying. It wont open programs for a good long while, usually taking a LOT longer than it usually does, when i press cntrl+alt+delete to get the security options up i get a blank black screen and a little window that says 'logon process failed to create security options dialog'. I originally thought this was a virus so i uninstalled my AVG antivirus and installed the newest one which is 8.0 or something, and scanned every folder on my pc... and nothing but a few tracking cookies, which left me stumped. Ive got over 40gb spare memory, deleted all files i dont need, so its not clogged up with crap. I'm not sure if this is a problem with my CPU, overheating or something, which is why its taking so damned long to process things, whether its a problem with windows vista, or i have a very well hidden virus. Any suggestions?? im tearing my hair out!!