One of the most safest is the registry cleaner included with CCleaner.Īdvanced SystemCare's registry cleaner, jv16 PowerTools Lite, Wise Registry Cleaner, Auslogics Registry Cleaner, Glarysoft Registry Repair and Registry Life are safer then most of the rest.īut still even the safer registry cleaners can potentially cause problems.

Most paid software are just scams making promises to solve any type of system errors like crashes and BSOD which registry cleaners can not do. The freeware version are usually much better then the paid software.

Many freeware versions are available, there is no reason to pay for one. If you use a registry cleaner, then choose one that is known to be more safer to use. That is why it is much safer to use advanced uninstall tools instead.Īlthough many registry cleaners are included with system maintenance tools, there is NO evidence that they will increase your system's performance. So registry cleaners only are able to fix software related errors, they can NOT fix system errors. However invalid keys can impact your installed software, not your system in general. Most invalid keys will not effect your system's performance unless they are invalid system startup entries.

But just because the key is invalid doesn't mean it will cause system errors. When most registry cleaners find an invalid key, they automatically mark it as an system error. It is much safer to use an advanced uninstall tool (like Revo Uninstaller, Geek Uninstaller, IObit Uninstaller) that removes left over registry keys from the uninstalled software. I don't recommend using them as daily use even if you know what you are doing. However if they delete an important registry key that effects your system's boot process, they can make your system unable to boot. Some registry cleaners take safe measures by auto backing up deleted keys and allow easy restore features in case something goes wrong. In general, they are NOT safe to use unless you know exactly what those registry entries do and if your system still needs them or not.

Auslogics cleaner