My computers all have huge hard drives and large amounts of RAM, but that doesn't mean they can hold everything and do everything and still run smoothly. Computers, Windows computers at least, run better and are much happier the less stuff they have on them. Here are my favorite ways to clean up my computers and improve performance and security: 1) Delete old restore points. This isn't obviously presented as an option and isn't possible unless you've got administrator privileges. But it can reclaim a lot of hard drive space. Restore points build up each time Windows Update installs or updates anything on your computer. I haven't found an option that auto-cleans them up, so here is the method for manual deletion. These instructions are for Windows 7, but there is something very similar in Windows Vista and even Windows XP Professional. A) Open a Windows Explorer window (windows key + E) and select your computer in the left pane, so that the hard dr...