Registry errors are some of the most common reasons for system failures. RegistrySmart has been designed as a rapid one-stop diagnostic and repair tool which claims to scan every inch of your hard drive in less than 2 minutes.
How it can claim to do this when all hard drives are different sizes, I'm not sure but nevertheless, it is still very quick.
The program focuses on all corrupt files, paths, and registry keys until it finds errors and repairs them automatically.
The developers claim this ensures that your system will then work "as if you just bought it" which is an extravagant boast since the only way to really do this is to reformat your drive.
At the most, expect your system to function only marginally quicker.
There are several programs like this out there, the most notable being Registry Mechanic.
RegistrySmart is certainly quicker but doesn't do a particularly better job. However, if you can't be bothered with long scans and just want a quick mild boost to your system, it's worth a go.