I typically run in Expert mode. However, even in Novice Mode, it cripples PD 10. The Undo option does not repair the registry because something is blocking it the Undo of the PD 10 registry keys. An error message is issued by RegVac that it cannot undo all the keys. Even in SAFE MODE, it cannot restore.
PerfectDisk 10 has to be uninstalled and re-installed to correct the failures. I haven't been able to figure out what other keys are being improperly removed.