Those who wants a registry cleaner software should read this
I decided to test the legitimate and genuine registry cleaners even though I rather see people not to use one. The test system is an XP system in Virtual PC. It's XP with integrated SP3. The registry cleaners should not find error in the registry because the system is unmodified and nothing was installed after the clean installation.
There's only 2 registry cleaner software that people should consider IF they really want a free registry cleaner. Also to prevent people in using something like commercial version of RegCure that gave hundreds of people... a problem instead of cure.
Better is don't touch the registry in Windows unless you have to e.g. deleting a registry key that were added by malware using manual removal method or tweaking the registry by following a guide from trusted sources.