If you’re looking for a good registry cleaner then you should be aware of a few key features to be on the lookout for.  First of all, you should determine if you’re having a registry problem.  While registry cleaners won’t do any damage if you don’t really need to clean the registry, you will want to rule out other, more serious problems first.  

Make sure to run an antivirus program to ensure that your computer is not infected by malicious viruses or software.

Also run a spyware scan.  You can usually scan your computer for spyware with a free download before purchasing the program.  This is a good way to make sure you aren’t at risk for spyware and identity thieves.

Lastly, run a registry repair scan and see what it finds.  If it finds many errors you might definitely benefit from cleaning out the obsolete and broken registry files.

A good registry cleaner will allow you to easily back up the registry and also undo any sort of changes you make.  Recommended software titles are RegCure by ParetoLogic and Registry Mechanic by PC Tools.  Both can be downloaded from RegistryRepairSolutions.com.