A bit about Microsoft Security Advisory 971778, Vulnerability in Microsoft DirectShow Could Allow Remote Code Execution (does not apply to Windows Vista, Server 2008 and Windows 7).
According to what I’ve read there is a vulnerability being exploited in Microsoft DirectX’s DirectShow in the form of a specially crafted Quicktime Movie. I don’t suspect any foul play on Microsoft’s part, but I find it very interesting that the vulnerability affects a Microsoft competitor, and that the fix is to disable movie playback on that competitor’s video product.
READ: Microsoft Security Advisory 971778
FIX: KB Article 971778 – has a Microsoft Fix it button to do the leg work for you
READ MORE: ZDNet’s Article on Dangerous Microsoft DirectX vulnerability under attack