Added second GPU for PhysX computing - Windows stuck on CLASSPNP.SYS

[BlackMartin]

Hello.

Im tried add second card (nVidia 8600GT) into second slot on motherboard for PhysX computing. Now if i try boot, my system stuck on "Starting Windows" screen and if I go into safe mod, stuck on loading file "CLASSPNP.SYS".

Where can by problem please?
Thanks for your responds.

 

[cloud8521]

fill out your system specs please

 

[BlackMartin]

Okey, filled.

 

[BlackMartin]

So nobody know? :/

 

[Everlong]

Have you tried taking the Physx card out, then booting in to Windows and uninstalling the graphic drivers, then booting up with both cards in and no drivers on?