Windows 7 blank DVI screen
I've just upgraded to Windows 7 Ultimate 64-bit. I had an issue during installation; after setup rebooted instead of going to the 'Completing installation' screen I just got a blank screen. I eventually(!) figured out that this meant 'un-plug your second monitor to proceed'. When I did this, installation completed in a snap and everything runs fine. However, whenever I plug my second monitor into my PC, it gets no signal, the primary monitor removes all windows. Icons, the taskbar and the cursor just shows the desktop wallpaper.