Hello Martin, In my case, it was a sysprep'd image built this way: - I first installed Windows Vista Enterprise unmodified with BDD 2007 - After first boot, some applications were installed - I downloaded and extracted Autopatcher for Vista (latest build) and installed "manually" all Critical and Non-Critical updates (with a batch file and the wusa command for all *.msu files) - I ran Windows Update and applied the missing Updates it found (3-4). - I ran sysprep, rebooted in WinPE and captured the image with imageX. After adding the WIM image in BDD 2007, I created a build and got the error. As my client asks for applications in the image, applying updates with pkgmgr was not necessary. And applying hotfixes and updates on the fly during deployment is not an option as this method seems very time consuming (in my test, it adds 10 to 15 minutes to each deployment). Largo.