I've had one running as a nightly scheduled task on my Windows 7 laptop for about ten years. Its primary purpose was to securely erase all the stuff in my Recyc

I've had one running as a nightly scheduled task on my Windows 7 laptop for about ten years. Its primary purpose was to securely erase all the stuff in my Recycle Bin as well as wipe search history, application history, etc. More of a privacy thing than a space-saving thing, really.