I've got pretty much the same problem as Alcazar: my Direct3D tests give me the same error messages. I recently upgraded my processor from a P-3 550MhZ to a Celeron 2.4Ghz, but that and the motherboard are the only things I've changed. I simply can't understand why this error is occurring, because everything worked perfectly on my 550MhZ. I've got DirectX 9 and the latest NVidia drivers (45.23) for my GeForce 2 MX 400 on my system. This just doesn't make any sense, and I'm at my wit's end!