BasilF wrote: » Are you sure you aren't caught out by another error in the book.. from memory it doesn't cover the vital step of actually including a boot.wim file when you build the iso...! e.g. copy c:\winpe_x86\winpe.wim c:\winpe_x86\ISO\sources\boot.wim More info here (see entry for page 67): MCTS Self-Paced Training Kit (Exam 70-680): Configuring Windows® 7 Unconfirmed Errata | O'Reilly Media Hope it helps...