With so many uses for the computer it should remind everyone how important it is to take care of the systems with every thing that happens.  When there are so many viruses and problems on the Internet that can affect your computer, you want to take every precaution to be sure there are not things on your computer that will affect its operation speed and accuracy.  The registry cleaner will remove all of the bits of data that have been left when you removed old programs and installed new ones.  There will be no need to be concerned because all of the refuse will be gone.