I am only advising on experience with 1000 plus users of RegMechanic and RegCleaner I have dealt with in the last year alone :smile:
I'd have replied the same even if a moderator posted it (they don't though as they are aware), because its nothing against you personally karanislove, but I'm aware of the horrors of users when using these and have seen them on every forum. The ones that are advertised most are the worst in turn usually, causing too many mythical advantages and too much loss leaving the user to only a format and grief. Reg cleaners need to be understood more before use or the damage done can be irrepairable. For one, you don't have much control over it, so unless you are well experienced with them, the user wouldn't know what is happening or why. Thats dangerous when its the most vital part of your computer to run. Most of the time even here are issue where the user has used such an app and now gets all sorts of errors, but we can never track it down (backwards) to what initiated it, but are just left to mop up the fragments leftover. It only makes matters worse.
I do use one, but I don't advise on anyone else using them unless they are very aware of both sides with experience and knowledge of what DCOM, Invalid Services, hives and how the registry is run etc are at the very least.
Take care.