Your PC is a very vulnerable machine. Every day when you log online, chances are you see the ads warning you what horrible things are going to sneak their way into your hard drive, destroy years of hard work, and email your credit card numbers to a criminal mob. So, it seems only sensible that the very first thing you want to do is find a reliable software package to help protect your computer against what everything that could wrong. But, what kind of software should you get? Do you need Anti-virus software or Anti-spyware software or both?