Why is my computer running so slow? If you think about this question often, and are looking for a way to speed it up, you will be happy to know that you can do quite a few things to fix the problem. 

Start by checking your hard disk: Open "My Computer," on your desktop and then right click your hard disk and click "Properties." You can tell if your disk is really starting to fill up. This is one of the most common causes of a slow computer.

Click on "Disk Cleanup." When you do this, you can hel...
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