I'm having a problem with Media Player Classic since I switched to Windows 7. When I open MPC, the screen goes black momentarily, then returns to normal and the video plays. When open a second instance of MPC, the app starts and the video appears to play, but the MPC screen is black. I say "appears to play", because the progress bar moves, but there's no video visible in the second (or third) instance of MPC. Has anyone else experienced this, and is there a solution? This applies to the latest version of MPC and MPC Home Cinema. I installed XP under Virtual Box and when I run it in the seamless mode I can see multiple instances of MPC playing normally on top of my Windows 7 desktop, but its virtual network adapters mess with (disable) Belkin Network USB Hub , so I've uninstalled Virtual Box. Help!