Thanks for the response. By deleting failed session files i mean that i totally clear folder with nlited windows files after i see it's unworkable. so it's 100% fresh source every time. About wmp slipstreamer - i have version 1.4.2.0 installed. About version of service pack - i've got a copy of windows with SP3 already installed. Don't really know, is it normal SP3 or not(the original disc of that **** corporate xp is in the central office in another country - so i never seen it with my own eyes) i'll try to get older version and install sp3 by myself, but i don't think this will work, because i tried this settings(excluding "kill oobe" ) on OEM home and pro versions both SP2 and SP3, and result didn't change. Also i tried to use nlite on another PC. No change. Ok, i see nobody here had this problem, maybe i'll try to find solution by myself. Thanks everyone