Quote Originally Posted by VAisForEagleLovers View Post
In most computers, it's all the updates from Windows that take up space and slow the thing down, and you can't get rid of them. One thing you can do, if you have an older operating system, is to reload the OS and then apply the service packs that have been issued, then the updates since the last service pack. Unless you are an expert with computers, I'd recommend having this professionally done. It's time consuming and needs to be done all at once as your computer is vulnerable until it's all loaded. Generally, though, once your computer reaches this point, it's a better idea to replace it. Reloading the OS and starting over is no trivial thing. Upgrading to a new OS always breaks a device driver or four, and I've never found a professional that was able to do it correctly. Every time I do it myself I swear I'll never do it again.
BleachBit is a great way to delete the update installer files left over that take up gigs. It's a free program.