I have XP PRO SP2 or 3, don't remember

, but installed in a FAT32 partition so I have DOS 7 access to everything.

XP boots to Login screen however it is immediately covered with dialog box "Security Account Manager initialization failed because of a device attached to the system is not functioning. Error status 0xc0000001". Says to reboot to safe mode, which I can do, but safemode L.I. is also covered with same error message.

I have deleted the 2 SAM's but system still comes back w/ same error and SAM's are replaced. I have not found a repair folder anywhere so dunno why SAM's return. I believe if I can disable the SamSs service, the boot will be successful but I don't know the syntax for start, manual, auto, disable etc.
Does anybody know and am I on the right track? I have to work in DOS since the machine will not boot to windows.
An alternative might be edit the registry in DOS but I believe to do it XP is different than was in 95/98/2K.
Mahalo & Aloha!