Just did a test and integrated 41 hotfixes into Vista Ultimate, and built an ISO. Didn't remove any components. Then I installed from the ISO into MS Virtual PC 2007. All went smoothly. Afterwards I ran Windows Update in the virtual vista image, it upgraded itself to Windows Update v7, and it told me there was only 1 update available (for defender) and a whole host of Ultimate Extras (language packs etc). All this was as I expected. Very pleased, I went back to square one with a fresh Vista source image, and did exactly the same as before, but this time I removed a moderate amount of components (nothing much, language packs, Welcome Center & MSN Install). But this time, after installing from the ISO and running the Windows Update, I was told there were 42 updates available. Some twenty of these were critical & recommended hotfixes which were supposedly already integrated into the Install image. So what went wrong? Did I do something different or did removing some components break the hotfix slipstreaming? Advice please? NigelS