I installed Windows 7 64bit via Bootcamp. When playing fast games I can see rows of pixels "lagging", which basically creates these horizontal lines on the screen. It is more subtile than it sounds, but I was wondering if this is a driver issue or a hardware issue? I have run Windows Update and also tried to update the nVidia driver (this couldn't recognize the hardware). My specs: 15" High Res 2,66MHz i7, 7200RPM, 4GB RAM Games played so far: Battlefield Bad Company 2 Trackmania Nations Splinter Cell Convictions I did NOT recognize it on Portal for Mac OSX. When installing I was only able to choose between 64bit or 86bit W7. After installing the 64bit, I got a folder which is named "Program Files 84x". Might I have installed the wrong version?