Every Microsoft Windows operating system has a registry. Your system registry holds a wealth of information about your computer, which is why we constantly hear from users that after using their PC for a short length of time, it no longer works the way it used to. This is due in part to invalid entries that exist in your system registry, that might exist because of software you are no longer using or software that was not properly removed. By removing these invalid entries, you can significantly increase the performance of your PC.