Another option would be to buy a bigger hard drive. You can replace the hard drive in a thinkpad quite easily, and an 80GB drive is pretty cheap these days. Of course, you'd have to reinstall Windows, which can be a pain.

There's no way anyone can tell you what to get rid of without seeing what you've got. Be very careful of what files and folders you attempt to delete if you don't know what you're doing. With the exception of temporary files, most files on the computer have a purpose. Maybe not now, or tomorrow, but when they're called upon, they have to exist. Some suggestions I will make if getting a bigger hard drive (internal) or buying an external drive isn't an option are: 1. Go into control panel > add / remove programs and look for any installed software you haven't used in more than 3 months. It's a candidate for uninstall to save space. Leave the Windows updates alone. 2. Any personal files (pictures, movie clips, music, documents) that you don't use on a weekly basis - archive them to a DVD-ROM to save space. Only keep the ones you access regularly on the hard drive. 3. Download a program like WinDirStat to see a visual representation of what kinds of files are using up all that space. (http://windirstat.info/) 4. Keep in mind that these are short-term solutions based on the fact that a laptop has an estimated life span of 5 years, so your Thinkpad is potentially reaching its twilight years. Once it's gone, your next laptop will have tons of capacity in comparison.

In the Windows folder are the uninstallers for all the installed updates. They're hidden but by going into Folder Options you can have them shown. You can safely delete all the ones starting with $KB. Doing that could free about several hundred megs.