Microsoft just released a fix for a serious security vulnerability in the way Windows renders Windows Meta File images (WMF patch). This flaw in Windows is considered serious. Which is probably why Microsoft came out with the patch today, instead of waiting till next Tuesday to release it under their Monthly Updates.
It is recommended that Windows users download and install this software patch ASAP.
For additional information, you can check this link:
http://www.microsoft.com/technet/sec.../MS06-001.mspx
Hope this will be of help to everyone.