Hello there, Using the pre 2003 SP1 version of winpe I was able to use a custom winpeshl.exe to boot the machine and run certain different apps (so dos boxes didn't appear etc.) .. However, since upgrading to the new version of WINPE included with Server 2003 SP1 the shell does not work. It continually returns LSASS errors ("The requested operation was unsusccessful" and the like) and reboots the machine. Does anyone know what has changed between versions that cuases this to happen? Or any pointers towards what I need to do to get it working again? Many thanks, Jamie.