Originally posted by Vulpine Taco:

If you are using Steam, and you get a message saying "WTF, Dude?" followed by a link, DO NOT CLICK THE LINK. It is a virus that will hack your steam and send the message to others. If you are already infected, here's a few tips.
1. Change your password and secret question. That seems to stop the virus pretty well, as, from what I can tell, it only affects Steam.
2. End the atieclxx.exe process through your task manager.
3. DO NOT RESTART YOUR COMPUTER UNTIL YOU HAVE RUN A VIRUS SCAN.
4. Make sure any affected people on your friends list know not to click the link.
6. Don't be a moron like me and open random links.