Registry maintenance programs are unnecessary. Unlike earlier versions of Windows, XP's registry is pretty robust, and not so easily damaged. It also has little effect on system performance, contrary to all manner of reports otherwise, most of which are put out by companies/people that make/sell registry maintenance programs.
About the only sort of thing you ever need to clear out of the registry, are malware related items, which any malware removal program will be able to handle just fine. Further, if you adopt an "Anything but Internet Explorer" browser policy, your risk of a malware problem will take a dramatic nose dive.
I wouldn't waste my time or money with any of those programs. Even free is too expensive.
Has anyone ever used RegCure?If anyone who has, can you please tell me about it. Thanks