yeah i'm encountering this problem too now, having been trying to take it in stages so I can spot when it is breaking, but still working on that could possibly be after i've slipstreamed BTS Driverpacks in though, but yet to be confirmed for sure edit..... have double checked txtsetup.sif, and nlite.inf is listed in there... second edit.. oh double fun...as a test, i stripped out the $oem$ folder, and tested again, no advanced inf error seen edit...11th Aug... nailed it to the Adobe Reader 9 Lite installation...for some reason if I included this in the GUIRunOnce installation, it would eventually generate that error. Moved it to cmdlines and now fine, even when creating a new user and logging in...no error seen