This indicates an attempt to exploit a remote Code Execution vulnerability in Windows Media Center.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted MCL file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted MCL file.
Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 2
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows 8 for 32-bit Systems
Windows 8 for x64-based Systems
Windows 8.1 for 32-bit Systems
Windows 8.1 for x64-based Systems
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.