computer freeze and crash when streaming media present in website

[moganc]

I've upgraded my graphic card a week ago and it seems like now every time i enter a website that have WMP-type stream in it, it buffers the video but the moment it starts all i see is green squares and then the computer freezes and a few seconds later i get BSOD telling there's a problem with NV4_Disp.dll. Now i know what you're thinking - prolly a bad driver, right? well, i have another windows installation in the computer with the same exact driver, and over in that windows, the problem does not exist. so i'm baffled. i've already tried reinstalling WM codecs but no luck.
any help will do. thanx.

[CWR03]

The fact that the same card works in the same computer under a different installation of Windows proves that it's a driver issue. Uninstall the nVidia drivers and the AGP drivers, then reinstall them, AGP drivers first.

[moganc]

didn't work. i've also reluctantly updated the drivers and no luck.
also note that all other video type files work on players and such. just when it's streaming there's the problem.