All I can suggest is:
Iif you are using an NT-based version of Windows (XP/2000/NT), then sandbox yourself by not using the computer as a user with Administrator privilages unless you are installing/removing/updating software. Use a restricted account for every day computer use.
Keep your AV software and firewall up-to-date.
Try not to click any websites you see being pasted into the channels you are in unless you know for certain that they are reputable.
Finally, don't accept any DCC's from people you don't know.
I've been abiding by these rulesfor years and have never (as far as I know) been infected with a virus. Good luck
