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Possible Duplicate:
Is it worth cleaning the registry?

Hi, I’m constantly seeing Ad’s about Registry Cleaning. Each time I see one of those Ad’s I remember reading an article (don’t remember who wrote it, but it was posted on one of those geek chat pages) a few years ago about it not being necessary to clean a registry, in fact, the article continued, it and said sometimes it causes more harm than good to run a registry cleaner.

I would like to hear your opinion about this, and if you think it is good to use one of these programs, could you recommend a few. Thanks in advance. garybo

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marked as duplicate by Mehper C. Palavuzlar, Sathya, BinaryMisfit Dec 27 '10 at 6:58

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Can cause more problems than they solve. – Moab Dec 26 '10 at 17:43

Recommend a few - the famous one is CCleaner.

As for required, I firmly believe the answer is no.

There was a recent question about computers and speed where this came up. You can read my answers and some of the others there. It should give you a bit of background on this subject.


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Microsoft used to produce a registry cleaner called regclean.exe. Still say no? A lot of these find orphaned keys linked to files no longer there because an uninstaller was poorly programmed. This solves many problems, including when you right-click the desktop and it takes forever to show the menu because the registry can't find the file it needs due to an orphaned key, some blue screens, and so on. Legit ones like PC HealthBoost appear to do all the right things to be in favor with Microsoft. – Volomike Jul 26 '13 at 19:27
@Volomike - I am not convinced... I looked for regclean.exe from Microsoft and the first article I found was on Technet ( ) which states this: "However, Regclean works only with the HKEY_CLASSES_ROOT subtree, which is almost never the source of major registry problems, and the program has been known to cause as many problems as it fixes." - – William Hilsum Jul 28 '13 at 20:14

Since almost all core Windows programs, and many third-party apps use the registry, if the registry is full of unused keys, it follows that registry access is slower.

That being said, for it to make a real difference in performance, you'd likely have to delete thousands of keys. Wil has mentioned CCleaner, and every time I've run that, the most keys I've seen it delete is about 400.

I'd say the only situations a registry cleaning are really warranted is if you are preparing the machine for or transferring it to a new user, as a registry cleaning deletes many MRU lists that hold recently accessed items and such.

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