Jitbit System Purifier is an all-in-one file shredder, privacy eraser, disk cleaner, free space wiper/eraser and startup programs manager.

... "FILE SHREDDER" - "file eraser" securely deletes files from your hard disk. Files erased with the file shredder are physically deleted and cannot be recovered or "undeleted" with disk recovery tools. The algorithms used in the file shredder are compliant with the US Department of Defense 5220.22 M sanitizing standard. Use the file shredder to completely erase critical information from your disk. System Purifier is fully integrated with the Windows shell: erase files from any windows-compatible file manager (e.g. Windows Explorer) using a context-menu.

... "PRIVACY ERASER" - erases your activity tracks and other unneeded data from your system. It protects privacy by cleaning up the tracks of your Internet activities and computer activities and contains multiple eraser tools like: IE address box typed URLs eraser, Recent Documents folder eraser, temporary (temp) folders cleaner, internet history eraser, web browser's cache eraser, IE forms auto-complete cleaner, open/save dialog history eraser, FireFox cache cleaner and many more.

... "JUNK FILE FINDER" - scans your drives for unwanted useless and temporary files, left by various applications. Use it to free disk space and optimize system performance.

... "STARTUP MANAGER" - controls windows startup programs. Find out what software starts automatically on boot, review the list and delete the unnecessary items.

..."FREE SPACE ERASER" - since deleted files are only marked as deleted, after some time your hard-drive's free space is not actually free - it contains lots of scrappy data. To prevent this data from being recovered, you have to erase the drive's free space.