Hi ricktendo64, first of all i have enjoying your tutorials videos so far ... i hope u will release the next soon ! I have done some tutorials videos too of DISM for the french unattend community on an another board. BUT ... when i have done my tuts, i have recommended to use a virtual or real version of Vista/XP to create an unattend based on Windows 7, because i was having trouble with this on a Windows 7 host. Problems were : - instability of DISM ("DISM corrupt please reinstall") - not able to dismount correctly, supposedly some files were in use ... - not able to clean/delete some files, for example i couldnt deletes the content of "WinSXS\Backup", i haven't the right or priviliege to do so ... - not able to run properly the install_wim_tweak.exe (but i understand why when i saw your tut) - etc ... While i was able to do all of that using a Vista SP2 x86 on VMware, 0 problem at all. Yesterday, i decided to retry using 7 as host, so i have installed 7 x64 ULTIMATE MSDN Untouched on VMware, install WAIK 7, place the install_wim_tweak.exe, and go ... BUT having the same problems ... while YOU ARE NOT as i can see on your video ... You dismount without any errors, your dism seems to be always stable ... so here are my questions : - Are you able to delete in the WinSXS\Backup\ all the files for example without having any error ? - Have you done something more on your Windows 7 to have the "full" control of all files (i have set full privilige in the user panel ... but still same errors). - Have you any clue why i have having those problems ? - oh and by the way, i have notice while i used install_wim_tweak AFTER integrate some hotfix, when i install the unattend i have the double of number of hotfix in the "windows update\installed update" panel (ex: 100 hotfix integrated, 200 appears in the panel), have you the same "bug/error", or again my PC is the only one in the world to have some weird thing happens lol. Thank you man ! love your work