Microsoft has just announced a major security flaw in how their GDI+ engine handles JPG images—Without installing this update; you are at risk.
The critical flaw has to do with how Microsoft’s operating systems and other software process the widely used JPEG image format and could let attackers create an image file that would run a malicious program on a victim’s computer as soon as the file is viewed. Because the software giant’s Internet Explorer browser is vulnerable, Windows users could fall prey to an attack just by visiting a Web site that has affected images.
You should visit this site to read up on the security flaw, and find out if you need too have your machine patched to pervent infection.
Official Microsoft release on flaw <== Clicky