Avast, a company you may know for their antivirus software and general research into viruses, made a blog post yesterday about a rather incredible topic... Someone's managed to put malicious code - basically, a virus - into several Minecraft skins, and it's already affected close to 50,000 players. Players who download an infected skin are at risk of damaging their PC, as the virus will try to delete important Windows files - and in some cases, even completely format any installed storage drives. These are some examples of skins that Avast said were infected Mojang have been told about the problem and are working to fix it. Until we get the all-clear from them, be very careful about changing your skin, especially if it is similar to one of the three skins pictured above. If you have some antivirus software on your PC then the chance of damage is greatly reduced. If you aren't, well... I highly recommend using a free version from someone like BitDefender, Avira, or Avast themselves. Don't rely on Windows Defender alone! EDIT: Mojang have posted some clatification on minecraft.net to update everyone, explaining that apparently this virus was never really a problem and got blown out of proportion.