Try and do a roll back to the previous driver to determine if the driver is affecting Realflight. I've had issues with NVIDIA driver upgrades in the past with some machines running XP. In the end we rolled back XP and went back to running Windows 2000. I think the issue was more how the operating system handled the driver than the actual software we were using handling it. I have also quit automatically updating the drivers because NVIDIA released a new one. What did you get by upgrading? Was it to solve a problem or did you upgrade for the sake of upgrading? Sometimes it is neccessary to upgrade. If it isn't broke don't fix it.