i have nvidia 64 meg video card xp pro no probs with the newest drivers.
most likely your card is going bad
same as the subject, i have xp with Nvidia RIVA TNT2 m64. this old AGP video card is having some small problems with xp, for example, when i click Shut Down from Start menu, the desktop goes grey but it is like stripes of grey desktops covering each other, leaving the top shown only. when i click CANCEL, it returns to normal.
CNET - Microsoft Internet Explorer _ |_| X
CNET - Microsoft Internet Explorer _ |_| X
CNET - Microsoft Internet Explorer _ |_| X
I suspect this as a driver problem. the newest driver from Nvidia is not supported by xp (displays compatibility error). what should i do? what version of driver should i install?

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