Samsung UA78HU9000RXZN, UA65HU9000RXSK Am having trouble launching/using apps, My file wont play

I am having trouble launching/using apps.

The Problem

Try this!

I launched an app,
but it's in English.	Languages supported by the app may be different from the user interface language.
How can I change the	The ability to change the language depends on the service provider.
language?
My application is not	Check with the service provider.
working.	Refer to the help section on the application service provider's website.

My file won't play.

The Problem

Try this!

Some files can't be played.

This problem may occur with high-bitrate files. Most files can be played back, but you might experience problems with high-bitrate files.

I want to reset the TV.

Reset	Path	Description
	Support > Self Diagnosis	Reset Picture, Sound, Channel, Smart Hub, and all other
Reset Settings		settings except for the network settings to their factory
	> Reset
		default settings.
Resetting Smart	Smart Hub > Reset	Reset all saved information relating to Samsung accounts
		and linked service accounts, as well as Smart Hub service
Hub	Smart Hub
		agreements and applications.