The registry in a computer controls each and every function. It is automatically installed at the time of windows installation in the same drive in which the window is installed For the proper functioning of a system the consistency within the registry should be maintained. Unwanted applications like viruses, spams, malwares are hindrance to systems performance, as we know. To make system free from such applications windows xp registry cleaner (if windows installed is XP) can be installed on the system. It automatically detects these malwares, spams, viruses if any the system and helps maintaining consistency within a system.