To get it to do what you want to do is simple.
Once Windows is loaded and asks for User name and password, dont. Instead hold down Ctrl/Shift/F3 that will put the computer in audit mode. Before you take out the drive to put it in a new system you need to run system audit OOBE and check the box to get rid of system specific drivers. That will make the drive ready to drop in any PC and it will scan the new system for drivers.