I get this error: Loading "C:\pebuilder\setuphiv" Error: loadKey failed:
can't delete folder until after you reboot
Get AUTORUNS by sysinternals
run it.. look for a start up entry called UPCLEAN
it apparently speeds up logons and log offs but interacts with the Hive
this is why it can't load the hive and get the key (as its already loaded via UpClean)
so disable it, reboot, try again ;)