Hey, if you would like to negate both of the hotfixes (KB891122 and KB902344), you have to update the Windows Media Format 9.5 Runtime. To get the version that fixes both updates, you need to download KB900325. It was a huge rollout for Media Center and it contained a file called wmfdist95.exe. Wmfdist95.exe updates Media Player and no longer requires you to download KB891122 or KB902344 (even on the Windows Update website). Extract all the contents of KB900325 and remove the file wmfdist95.exe. To get it to install silently, you have to repackage it using iexpress and use the command:
"wmsetsdk.exe" /DisallowSystemRestore /WMFDIST /Quiet /R:N"
Then place it in your SVCPack folder and SVCPack.inf file.
Download KB900325:
Here