For those of us who use Windows N Editions, it can sometimes be a struggle to view certain types of Media content. This can also prevent some games from running correctly.
I purchased Red Dead Redemption II yesterday at EPIC Games and installed it. I got a cryptic series of Error messages from the RockStar Launcher. MF.dll not found. Mplat.dll not found.
Use this command from a terminal running in administrative mode. Right click on the command prompt icon and run as administrator, then paste the following in.
dism /online /add-capability /capabilityname:Media.MediaFeaturePack
This resolved my issue with Red Dead Redemption II downloaded via EPIC Games for the RockstarGame Launcher errors.