A little while ago i "upgraded" to Vista Ultimate. It isn't bad as everyone thinks...anyways. A few days ago, when i sign onto netzero, my computer crashes when i multitask just about anything. I started up minesweeper while downloading a video driver, and the comp crashes. When i come back, it says NetZero is corrupted and i have to reinstall. I have had VistaU for a few weeks and have had no problems. I have considered it may be my motherboard, but i can't be sure. Any help?