Compare Free Registry cleaners

PC's today get cluttered with more junk and extra files than ever. This results in slow PC performance, frequent system crashes, slow Internet connections and worse. Fortunately there are some great software downloads that you can use to repair these problems. We've reviewed most of the Registry Cleaners on the market and selected three best ones that will make your PC running faster and more stable than ever. These easy to use programs can have your PC cleaned and tuned up in no time.

Registry Booster 2009

RegistryBooster is the easy answer to registry problems. It conducts deep scans of your registry to check for errors and conflicts, then repairs and optimizes the registry to peak performance and stability. Periodic scans will keep your registry "clean" and will greatly enhance your system’s performance and stability. You’ll see immediate increases in speed and decreases in system conflicts.

Registry Mechanic

Registry Mechanic safely cleans, repairs and optimizes the Windows XP or Vista registry with a few simple mouse clicks! By using a Registry Mechanic regularly and fixing registry errors your system will be more stable and faster without pricy hardware upgrades.


ErrorSmart uses the industry's most advanced error-resolution technology and puts it to work for you. By scanning your hard drive, analyzing the errors and correcting the problems, ErrorSmart can restore your system performance and increase startup speed by up to 70 percent.

Common PC Errors
A good Registry Cleaner will clean and repair thousands of types of errors. Some of the more common of these include:

Runtime Error - An error that occurs during the execution of a program.
ActiveX Error - An error caused by certain browser settings and misconfigured system files.
DLL Error - Missing or corrupt .dll files often occur when removing or installing a program.
.exe Error - Often occur during system or program start up due to unneeded files in the Windows registry.
General Protection Fault - Occurs when a program that is running violates the hardware rules in some way.
Blue Screen of Death - Occurs when Windows cannot recover from a system error. Usually requires a reboot.
Windows Explorer Error - A dirty registry may cause Windows Explorer to get stuck in a loop.
iExplore or iExplorer Error - An error related to your Internet Explorer browser often causing it to shut down.
Access Violation - An error that occurs when an application tries to access storage not designated for it.
System32 Error - An error often caused by missing or corrupt system files.
Windows Installer Error - Caused by 3rd party "shell extensions" resulting in a white screen and/or crash