I'm running the Windows 7 Beta build 7000 on an HP Pavilion zd8000 laptop. Pentium 4 3.0ghz, 2GB ram, and ATI Raedon Mobility x600 graphics chip with 256MB dedicated memory. This morning my display was running just fine at 1650x1080, 32-bit color. After installing iTunes 8.1 and restarting, my display is stuck at 640x480. In screen resolution options, I'm able to move the slider up to maximum resolution, but then it tells me it is "unable to save display settings". The monitor type is listed as "unknown display device", rather than "generic pnP device". I also cannot access monitor properties. Even though I'm running as administrator, it tells me I "may not have sufficient authorization" or something. I should clarify that this is NOT a driver issue with the graphics chip. Those drivers are working just fine, and I've uninstalled and reinstalled them just to make sure. When I connect an external display my primary LCD shuts off and disappears from the displays list, as if it weren't attached. My external display is fully adjustable, scalable, and accellerated. Windows 7 just refuses to recognize my LCD. I'm currently running Ubuntu 8.10 and the screen looks just fine and is running at native maximum resolution. The problem is obviously software-side and not a hardware issue.