I am working on a computer that at first wouldn't start. It would try and start then shut completely down. Long story short I took out two memory sticks and now it will start. The first time windows loaded it took a very long time, 20 - 30 minutes, then I couldn't get the screen saver to stop so I turned it off and am starting it in Safe Mode with networking. Starting it in safe mode is also taking forever. You know when you get the "Loading Windows Files" message and it quickly scrolls through loanding files...it did it slowly, line by line. Safe mode is trying to load as I type, after about 4-5 minutes I am just now seeing the windows Welcome sign and it is loading Windows. It is going right to screen saver mode. I can not get it out of this mode. My Client just recently reinstalled Vista, she was getting the BSOD, most likely the memory sticks.
Just before I hit submit, after 14 minutes the desktop screen finally appeared.