Recently had a computer crash and upon reboot got error of problem with display driver. uninstalled and then reinstalled driver. When boot up normally at some point display starts to go blank then reappear. at times upon reappearing the computer freezes up and the only way out is too do a hard shut down. The only way the display is stable is if I enable the VGA mode. Any suggestions? I have Windows xp, w/samsung syncmaster 730 flatscreen monitor and a Nvidia Geforce FX5200 graphics card.