Try turning off the RPC protocol. Restart in safe mode, right click on "my computer", go to "manage", click "services and applications", click "services", scroll down to "Remote Procedure Call". Highlight it with a single left click, then do a single right click, you should see a menu drop down, go to properites and click on the "Recovery" tab. You will see three drop down boxes, make sure they are set at "take no action". If they are not then set them and click "OK". Do that for both RPC features (they are on top of each other in the system menu). That should fix the rebooting until you can complete the removal.
I am assuming this is an XP system?
93 Black Mustang GT