I have an ADP test system 1st HHD C: . Because she won't be needing the test system very often and ADP recommends only one installation per OS (the test system has fake data) ,I don't need two modems etc I just added a 2nd drive F: and installed XP so the user can have dual boot. Is there a way to hide the C: from the user when she boots to F? I don't want her saving there or even knowing it's there. Will the ADP app on C: interfere with the app on F: ,both have Windows system files ofcourse) ? Or should I just physically unplug the 1st HHD C: ? And not worry about it........Thanks,Joanne