On a modern computer, there may be hundreds or even thousands of potential host programs. Scanning every one of these programs every time the virus scanner is run would take an unreasonably long time.

The Drive's DIYers show you what an OBD2 scanner is, how it works, how to use one, and which is the best you can have in your home garage.

Vulnerability scanners are automated tools that allow organizations to check if their networks, systems and applications have security weaknesses that could expose them to attacks.

If the barcode scanner does not have a female pass-through port – most do – connect a PS/2 "Y" adapter cable to the keyboard port on the computer.