Web of Trust rates that link as being a site of poor reliability and trustworthiness Zacs, and it's trying to sell a registry clean...
If you feel your registry is bloated and don't want to do a spring clean style PC reformat, then there are free registry cleaners available. CCleaner (
http://www.ccleaner.com) is a program primarily designed to get rid of unwanted files, but it has a basic registry cleaning function that will remove unnecessary entries and duplicates.
Eusing Free Registry Cleaner (http://www.eusing.com/free_registry_cleaner/registry_cleaner.htm) also comes highly recommended on Gizmo's Freeware reviews, though I have not used that myself.
If you decide to use a cleaner, always take advantage of the program's in-built ability to back-up your registry file prior to cleaning. That way, if something important is removed (though it shouldn't be) then you can restore the registry to how it was previously.