You need to purge windows of the driver if installed (device mgr, find it, delete it and check the box to remove driver software). Reboot and don't install any drivers if the OS asks except for standard VGA (it will automatically do this), reboot. Next go get the XP driver, disable driver signing enforcement, add "featurescore=fc" to the INF (google it), and then update the SVGA card to the XP driver for your card (pointing to the modified INF), it should install.