Today I downloaded the win7 64-bit Nvidia 181.71 drivers to replace my vista 64-bit 181.20 drivers and was unable to use my dual screen at all for two hours i tried to get it to use both but it would not turn on the 2nd one ever. Windows even saw it and showed it in the screen options but when I tried to use it it would just say you can not save these settings, so I was force to go back to the vista ones so i could used dual screen again, any Ideas why those drives would be anti dual screen?