I guess since I deal with this on a DAILY basis and am considered a computer security expert (tongue in cheek) you all might want to go to the following site and install the latest Microsoft Patch that deals with the WMF (Windows Meta File) handler exception.
This will update your OS with MS06-001 which was released today by Microsoft. This is a VERY serious vulnerability that could result in a crafted JPEG, GIF, etc to contain code and if not patched a person could end up controlling your machine.
This patch will result in a reboot. The KB (Knowledge Base) Article is KB912919
Get the security update for the Windows Meta File (WMF) vulnerability from Microsoft Update. The bulletin title for this update is: Vulnerability in Graphics Rendering Engine Could Allow Remote Code Execution (912919). Learn more about why Microsoft released this update.