This looks like a Registry fixer. There are several of these available online, and $20 ain't a bad price. I can't say about the quality of this particular product, but registry fixers are a really good idea for a computer that's other than brand new.
Just be aware that although registry errors are numerous and bad, fixing them isn't exactly a cure-all for Windows. Lots of potential pitfalls in Windows. Any Windows. Equally important of course is spyware & virus protection, etc.
Radar
