I cannot install KB 968211 "this update is not applicable to your computer"

Go to Control Panel and select Programs and Features.

Select "Turn Windows features on or off".

Under "Media Features" turn on (tick) Windows Media Player. Press OK.

From the link you posted:

Windows 7 N and Windows 7 KN editions include the same functionality as Windows 7, except that these versions of Windows do not include Windows Media Player, and related technologies.

End-user customers can enable the media functionality to work properly by installing the Windows Media Feature Pack for Windows 7 N and Windows 7 KN (KB968211).

Do you have N or KN?