My images on the computer screen started to flicker on and off. Happened more and more as day went on until the blue screen came up saying something about NV4_disp in error. Rebooted in safe mode, and searched the internet, and found this is a common problem with my Nvidia 5200 graphics card. Ive had this computer since 2004 and still have the original drivers, never had a problem before, I'm thinking the computer has finaly died. Good thing I have everything backed up. Uninstalled the drivers and installed the latest for my little card and rebooted, everything is back to normal. Hard to believe the old drivers, dated 2003, caused this problem today.