Bob,
The tech's owned a cyber-cafe for several years and has had no problems with his computers since using this program
That's quite a different matter - in this situation it is not a problem to simply restore a computer to a previous "good" state, as there is nothing to "lose" on the PC.
Many (all?) schools, universities, public bodies (libraries etc.) use this approach - coupled with a very restricted build for users - to manage their PCs.
As I said before, it isn't appropriate for a personal PC.
SD