Ten Free Must-Have Security Tools - Secunia Personal Software Inspector
Secunia Personal Software Inspector
The Secunia PSI examines .exe, .dll, and .ocx files on your computer and matches the data against a file signatures engine to determine whether you are running unpatched software programs. It then provides help in patching the vulnerabilities that are identified.
Download link: https://psi.secunia.com/
eWEEK's Ryan Naraine puts together a list of 10 free must-have consumer security utilities to help keep hackers at bay.