after spending a bunch of time googling, and trying to copy/paste lusrmgr.msc from my laptop to the machine in question, i have given up. for sure i would have been back in business with a new install, but i figured i would try to add a bit to the conversation. i could not re-enable the mmc plugin, even after copying lusrmgr.msc to the machine. im sure there is a regedit or security policy setting somewhere, but its not worth it to me to hunt it down and kill it. reinstall here i come. *edit - after creating a new burned disk from a new session, where i only chose to update drivers, i had the same missing local users and groups. i had to do a new install on a new machine, add my intel AHCI drivers and nic, then reinstall xp sp3. at that point, i had my local users and groups snap-in in the MMC. dont know if it was something i did, or something wrong with nlite. im just sayin...