I'm facing the same problem atm, however all attempts to get WM11 to accept an xvid codec afterwards have failed. Koepi, K-lite, ... doesn't seem to matter what I install, WM11 will not find the codec. Any suggestions on how I can force this ? If not which vlite option triggered this, disabled media center or movie and DVD maker ? Another issue I was facing is the disabling of security center. After installing the standard software and rebooting I think windows wanted to show me some sort of security warning, which lead to a 5 min windows lockup followed by a warning on black background "Security center unable to create window ..." or similar. System would not respond after that. I had to re-install with the option turned back on. I'm running a dutch OS btw. Thanks in advance for the help guys.