Tsk, tsk Doc. You of all people should know that WHQL doesn't matter.
I don't know if you use nHancer or not, but if you do, you're going to have to use the 197.xx drivers until an updated version of the program is released. The Quadro 197.90 drivers have been getting good reviews. I've got them downloaded and will try them later. You can get the drivers from NVIDIA and a modified .inf from Laptopvideo2go.