That's correct, I installed SLIPatch first and then the drivers. I rebooted after installing the drivers, the system asked me to do it it anyway. I installed the drivers in SLI boot. When I installed the 270.61 drivers first, I had the 266.58 drivers + SLIPatch v.1 final running, which worked flawlessly. Then I upgraded to 270.61 + 1.42 SLIPatch, which is when I uninstalled everything and did did driver cleaning.