I have a Dell Vostro 1510 and warranty expired in Sep 2009. I recently formatted my hard drive to re-install WinXP. As I install VGA display drivers for Graphics Card nVidia 8400M GS, the screen goes weird something pinkish or sometime blank with some lines moving up/down. I have installed drivers that are provided to me my Dell. Is it hardware or software problem? How do I approach this problem? Please help..