Neptunno, creo que acabo de dar con la solución al problema….efectivamente, es tema de drivers y incompatibilidades...¿puedo pegar aqui el texto? Creo que sí:
also there is a problem with the 71.89 WHQL drivers and Via chipsets, which causes graphics corruption of start menu icons, garbled desktop graphics etc.
i cut&pasted this out to fix mine..
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A guy called slartibardfast over at nvidia forums posted a fix for this which worked first time for me with the 76.41s. Really easy too - no forceloading of AGP drivers or voltage modding. Hope it works for everyone else with this problem.
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Some AGP 6xxx series Geforce graphics cards on VIA Mainboards have displayed corrupt 2D graphics (e.g. Orange Scratches, Weird Icons, Irregular Tiling) when used with the latest Forceware Drivers (7x.xx).
Initially I suspected it was some sort of issue with the GART Driver especially since Microsoft have decided to replace all AGP 3.5 GART drivers with Windows XP SP2's Universal AGP Driver. I ended up trying VIA's old Windows XP GART driver, this was to no avail.
The actual fix is a simple registry entry "UseUncachedPCIMappings" and most importantly it is GART driver agnostic!
As the registry entry location varies the simplest way to add the fix is to load "nv4_disp.inf" in your favorite text editor and search for
[nv_SoftwareDeviceSettings]
And anywhere under this section add this line:
HKR,, UseUncachedPCIMappings, %REG_DWORD%,1
Then install the driver using the standard setup.exe method reboot and enjoy the latest forceware drivers!!!
P.S. If you already have a 7x.xx forceware installed and you are suffering the above described corruption, grab RivaTuner and use its "Power user" feature to edit the registry entry.