My onboard Nvidia GeForce 6100 nForce 405 (Microsoft Corporation - WDDM) video card has lost it's blue color. I've installed an ATI 7100 64MB DDR V/D/VO PCI card and cannot locate drivers. It will not accept the latest Catalyst drivers as it is not a HD card. Any ideas on where to locate a compatible driver? I'm running the 32-bit version. I also changed my Display to a Sony DVI, but cannot update the .inf files as no Monitor shows up in Device manager.