Remove sensitive data from your hard drive by overwriting it several times.
Eraser is an advanced security tool for Windows that allows you to completely remove sensitive data from your hard drive by overwriting it several times with carefully selected patterns. The patterns used for overwriting are based on Peter Guttmann's paper Secure Deletion of Data from Magnetic and Solid-State Memory and are selected to effectively remove magnetic remnants from the hard drive.
Lock and unlock your PC with a USB flash drive.
Protect your PC from USB viruses and remove suspicious autorun.inf files.
Find and remove malware from your PC.