Registry is the very important part of a windows operating system. It contains all the details about your windows machine. The registry is very important for the OS to load. If the registry is corrupted your windows cannot be loaded and sometimes you may need to re-install your OS. If you install any software all the data related to it will be stored in the Registry. So over the time the size of the registry increases which may slow down your machine. So it is advisable to clean the registry often when you feel that your system has become very slow. There are many software’s on the internet which will help you to clean your registry. The software’s can also help you to fix the registry errors. SO if you have got any problems with registry try to use a registry cleaner softer before re-installing the OS.