i recently got a dell inspiron 1501 and it came with windows xp home edition and i tried to upgrade it to vista home premium. A ble screen came up oncem during the installation and then it continued after. Once the installation was done it seemed to work fine then i closed my laptop and opened it and the screen was flickering in and out with blue line i could still see the login screen a little but it constantly kept flickering. hen i turned it off and it would never start up again. What could the problem be.