ok.. now i discovered something new and it will let you know that there's something wrong with the video card or windows or something..
I've always been using auslogics boostspeed, and looking it up i found this... Under WinXP and WinVista it says "Video Memory: 512,00 MB", under Windows 7, Nothing
Check out the Startup Registry Entries; under WinXP or WinVista there's always 2 entries from Nvidia, check under windows 7.. there's nothing!
PD: I can't play a single game

i installed today Ghost Recon Advanced Warfighter I (im not a big gamer) and it doesn't even let me load the game! (Apparently not enough video memory)
PD2: I still don't know how the f*** a have aero running but this is for sure weird and i still can't find a solution for it!
PD3: The game IS ok, i've installed it on WinXP and WinVista and playing it in a medium/high settings without problems
Hopefully you will find a solution, or at least guide me into one!
Thanks!