I am getting an error when integrating a hotfix "missing needed files, integration aborted" on a Windows 7 Ultimate build. This is a fresh install of windows 7 and using a fresh copy of the MSDN iso files for the base. I have never been able to get one cd built and get this error on all machines I have tried it on. WAIK is installed and the Windows System Image Manager version is 6.0.6001.18000 the 64 bit wimfilter is installed. I am trying to build a Windows 7 ULTIMATE 64-bit MSDN (Not enterprise or VL version) Any ideas? Please help....