I think Bhagwan could be one of my customers
What he outlined is almost the exact procedure including the cost!!!
With regard to registry cleaners and tweakers, CCleaner is one of the only reliable one's I use, and I have used hundreds in testing.
It's the only reliable one for all o/s's and haven't once had a problem due to using it.
I service in excess of 500 computers per year and I've seen the good the bad and the very ugly.
Be extra careful of downloading any registry cleaner from google ads, they are usually rife with spyware or at least wipe out half your registry all in the name of "look how good we are - look what we found"
Regscrub is another demon which finds lots of stuff but has a tendency to wipe too much including crippling the flash player in explorer, so that even if you install it again the references are corrupt.
I never advise any client to fiddle with the registry at all, as long as they have decent virus protection and and spyware protection, it is best left to those in the know.
*The most common cause of spyware and virus infestation is failing to update the definition files of the program BEFORE scanning (or for those naughty clients - not scanning at all). Then they blame the products or me, because they are too lazy to update and scan just once a week.