How to setup a Media PC/HTPC?

I am looking to setup a media PC/HTPC for my parents.
It should be using Ion platform(It is alright for 1080p/Bluray, right?)

But i have no idea what software to start with....
As it is mainly for my parents to watch the video/TV episode downloaded online
I am looking for software which is very easy to use, with just a TV like remote they can control what they needed.

Any idea where i should start with?

Windows Media Center in Win7 can do right i want right?


you need  media player not a HTPC