The internet ISN'T safe, so take some proactive meaures by getting tested. Have your PC tested by using the FREE services below.
But why list so many? Well, unfortunately the quality of each vendor's test vary. Some are good at some things while others are good
at others.
Well, here's the CERT's Windows NT Intruder Detection Checklist.
Here's the quick and dirty way of checking if your IP was compromised and used for an attack by checking DShields database.