Hi,A few days back i installed 7 (64bit) version. I have a NVIDIA Geforce 8800 GTS and 2 screen works perfectly, but... I cannot select the projector as a second screen.I can select a second screen (LCD screen), but when i connect my projector and try to select that, it doesn't change anything.(Maybe I'll have to ask this question to Nvidia, but I want to know if other people have the same problem)

Since no one else has commented, you will probably indeed have to ask nVidia. It is no doubt a problem with your Video driver.Rating posts helps other users Mark L. Ferguson MS-MVP

Have you tried pressing Win+P ?I'd like to actually do something good and/or valuable about it, but at the moment I'm just stuck giving out suggestions for everything :P

since the latest version of the driver, the problem is no longer there. But, since the RC version, my pc freeze for some time... after 15 minutes or so, I can work again.Could this also be a driver problem?

Have you tried pressing Win+P ? I'd like to actually do something good and/or valuable about it, but at the moment I'm just stuck giving out suggestions for everything :P This is actually a great improvement for windows 7!