RegistryCleanerXP is a fake security tool that is advertised by RegistryCleanerXP adware. RegistryCleanerXP is able to install itself through browser security holes, or via other unconventional and unethical mechanisms. Once it is installed, RegistryCleanerXP will display fabricated security warnings that look like Windows system notifications. These notifications will urge people to buy RegistryCleanerXP to clean their system from imaginary security threats. Remove RegistryCleanerXP as soon as possible or run anti-spyware application to eliminate this malware.