Square Privacy Cleaner from NoVirusThanks helps hide your tracks
Square Privacy Cleaner (SPC) is like a lot of other track-hiding apps, offering to remove things like cookies, browsing history, MRU items, and clipboard contents. Internet Explorer, Firefox, Chrome, and Opera are supported, as are a number of other apps -- including Adobe Reader, Windows Media Player, MS Office, FlashGet, 7-Zip. Temp and log file cleanup is also supported.
Hit the settings tab, and you can configure SPC to handle various file clean-up roadblocks by terminating running processes and deleting locked files on reboot. Cleaning can also be scheduled to run automatically at startup or shutdown.
Square Privacy Cleaner is a free download, and it's available as both an installer and a portable app.