When to use disk cleanup

How often should you do a disk cleanup and when you do what should you delete?

I'm not a big fan of the Windows Disk Cleanup feature. I run the freeware CCleaner (formerly CrapCleaner) to clean things up every week or so. It depends on what I've been doing, since some activities create a lot of temporary files. When you have a lot of temporary files, performance can be affected noticeably, which is the main reason I clean things up regularly.

The default settings in CCleaner go slightly too far in my opinion, so I always disable a few categories, leaving it configured to delete the following:

• Internet Explorer > Temporary Internet files
• System > Empty Recycle Bin
• System > Temporary files
• Firefox/Mozilla > Internet cache
• Opera > Internet cache
• Google Chrome > Internet cache