Step away from the defragmenter...it is of NO use to you!

In fact, it's not of a great deal of use at all, just something else to help occupy disk space.

First, backup all your porn to a CD or DVD, then delete it from the hard disk, this will increase space to nearly 50%

There's a few 'hidden places' you can delete stuff from to reclaim a little space. You can always remove programs you've not used for years, and forgotten what they do, including games.

Your best bet is to buy a new, bigger disk, and clone your full one onto it - this keeps everything how you have as it is now, but you gain a skinful of disk space.

Or, buy a new hard disk, install it, leave the old one connected as a 'slave', install Windows (if that's what floats your boat) and then refer back to the original as an 'archive'. There's loads of ways to do it, but that's my favourite.