I almost always buy used games because I am cheap af. I refuse to buy them at gamestop too because their prices are too high. I buy most of my games from letgo, craigslist, ebay, yard sales, or flea markets. Why spend $60 for a game when you can buy a game for $20. I almost always sell single player games after I beat them as well.

Try running it as an Admin.

Yes, it has tons of exclusives that the Xbox One is not backwards compatible with. Also, if you get the right model it will not like rrod.