I had asked 2 questions about my 6 weeks during computer problem:' is Windows 7 That Bad??', and 'help'... Windows XP seemed to get slow and somewhat erratic, so instead of re-installing XP, I installed the 64b version of W7 ultimate, downloaded as 'freeware'. It was a chore to install, and much of my hardware was not recognized (no network port (= internet), only generic CD ROM instead of DVDRW, etc.). Problems shutting down, and SLOOOOWWW. So after a while, I re-installed my trusted XP, but things did not get better (at all!). This was not normal! Since my HDDs came on and off, I figured it ought to be the motherboard. It always (2 1/2 years) worked fine, but after some internet search (I also do have a laptop), it seemed to be one of the worst MBs ever made... But a spare laptop HDD got fried instantly (motor+ is dead)... So I ordered a new one: A nice old fat Asrock, with 4 memory slots, and 7.1 sound. It lasted 4 hours... No more picture, not by the board, not by the added card... By warranty, the MB might have been bad, so I got the replacement. But I did not trust my TRUST power supply anymore. So I bought a new 500 GB HDD and new (Cooler master 460 W power supply). Everything was wired up, Windows 7 installed, and it runs great!!! The laptop disk is dead, but my old system disk is most often recognized... There was still a lot of important, non backed up data on it (!). I was able to secure all of it!!! So my conclusion is: it probably was the power supply: don't trust TRUST!!!