It is not a pleasant sight when your computer freezes up, so the question why does my computer freeze up is one of the most asked questions by the computer users. The answer is quite simple, there is unnecessary information, too much so called junk in your computer registry that just takes up all the free space and does nothing except blocking the operation of your system. The only answer is to try to clean up your registry, and if you haven’t done this before and you are too sure that you will be able to do it safely, you should seek a professional for help. There are also numerous programs you can choose from to help you clean up your computer’s registry.