Is it possible to create an install wim the same way an install wim gets created by Microsoft? For example, the wim for update3 for win 8.1 is about 3.6 Gig in size. It has about 20 updates that have been superseded and can't be removed from the image. I'd like to create an install wim without those updates. I tried using Update1 as the base and installed the still valid u3 updates, but the install wim is 1GB bigger than the original U3 wim. Resetbase doesn't work because the U3 updates are flagged as pending. Anyone know of an alternative method to do what I want or know how MS creates their install wims with no pending flags and the reduced size? I've read about sysprep and generalize, but it seems there are restrictions (KB828287) that apply which don't seem to apply to the install wims created by MS. I may be wrong though. Thanks for any infos.