DriveShield+
Price: $60
Worried about spyware, worms, viruses and other intruders invading your computer? The aptly named DriveShield+ for Home Computer Protection can help ease such fears. Once the Windows-based software is installed on your PC, every time you reboot, it eliminates all changes and restores your hard drive to a predetermined configuration, effectively undoing any sneak attacks. You also have the option of saving specific changes, such as a new password or newly installed program, in a private section of the hard drive.