I would recommend CCleaner for some little registry repair but if you need better registry repair, you can always buy full softwares which are made to optimize your computer overall.
There are several free registry cleaners available online. Some of the best free registry cleaners that are compatible with Windows: CCleaner, JetClean, Registry Repair, EasyCleaner and AML Free Registry Cleaner.
Antivirus Software is the best solution, registry repair software can repair registry and clean up the registry rubbish including missing shared DLL files, unused file extension, ActiveX and class files, application paths, redundant registry files, error messages, user action records, redundant DLL files, winzip open history, Winrar to open history, word open historical records, public documents, start menu, file type, system startup entries, uninstall the software item, software application paths, fonts, help file, etc. If not repair and cleaner registry after used the computer a long time, the registry will be bloated, and computer speed will be more slower. The following is ten free registry repair software reviews may be help you! you can reference Top 10 Best Registry Repair Software Reviews, http://www.bestexternalhdd.com/repair/top-10-best-registry-repair-software-reviews.html
A free Microsoft Vista registry cleaner is a piece of software that can be downloaded onto a computer or laptop. This software helps to maintain and repair any issues that a computer or laptop may have that is not allowing it to function properly.
Ccleaner
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There are some out there that are free but with free software you have no guarantee and no back up support if you have any problems. Before you download any free software make sure that you research it first and make sure that it is a good one.
RegCleaner is a free registry cleaner software similar to Registry Mechanic. You can download and use it for free at http://www.sofotex.com/RegCleaner-download_L4965.html
The website Macecraft contains detailed information about comparisons of free registry cleanser software. Visitors to the site will also be able to view reviews left by other users.
Free registry cleaners can be found online on pc support websites, software websites, and other computer related websites that more than likely carry not only lists of free registry cleaners, but also information on the pros and cons of each free registry cleaner.
CNet recommends the aptly named Windows Registry Repair software to fix registry problems on a PC. It has a free download available, and CNet guarantees no malware or unwanted files as part of their downloads.
CCleaner
Registry repairs can be carries out at home as there are several repair programs available to download for free. CC Cleaner and AVG produce the highest rated registry cleaners.