Thanks very much for a well thought out and executed utility.
I had an odd problem in Vista, in which request for help in Microsoft Answers and Technet forums went unanswered.
My PC worked properly only when running in UAC - off mode. When UAC was on, some system functions failed
all supplied scheduled task, including the Microsoft supplied tasks.
After running the registry and filesystem permissions reset it all started to work again.
The restore important services log shows the following (here is the first four lines)
Error: The system cannot find the file specified.
Error: The file or directory is not a reparse point.
Error: The system cannot find the file specified.
Error: The file or directory is not a reparse point.
etc, etc. on to the end, another 30 or 40 lines