Windows registry mutilation using a registry cleaner:

Registry Cleaners have their own disadvantages like poor distinction feature. However, some Cleaners easily make distinction about the severity of errors but they fail to rate errors and usually classify them critical without any reasonable ground for claim.

What are the disadvantages of Registry Cleaners?

Most importantly, security critics claim that there is no authentic method to determine if third party software contains a valid key or contains useless information.

Weakly developed registry cleaners may certainly not identify whether a particular key is still in use by Windows or what dire consequences it may have on being removed.

Make sure you have an effetive and proven Registry Cleaner to make sure you get a fast PC

The abovementioned flaw in Registry Cleaners create some worrisome situation such as malfunctioning of system, loss of functionality and accessing Microsofts application compatibility updates to prevent harmful Registry Cleaners.

Registry cleaners are unable to repair undeletable registry keys created by null characters embedded in their names. This can only be done by dedicated tools like Sysinternals RegDelNull, which is now owned by Microsoft.

Recovery Power:

A registry hive, which a system is unable to mount, cant be repaired by a registry cleaner.

Despite all these problems, a corrupt registry can be recovered in several ways supported by Microsoft. For instance Automated System Recovery by using System Restore or by running setup from the Last Known Good boot menu.

Malware elimination:

However, there are several ways supported by Microsoft to repair a corrupt Registry. For example Automated System Recovery feature of Windows XP wherein last Known Good boot menu is achieved by using System Restore or by running setup.

Registry Cleaners fail to detect or delete Registry entries linked with a rootkit that can conceal this information from other processes.

It is a must for a specialized tool to compare results from raw core registry storage with that given by Registry API.

Do Registry Cleaners work in application virtualization scenario?

Registry Cleaners could not remove those Registry entries which are written for a virtualized application.