Is my PC good?
Master Of Puppets
That is a very old PC. It will NOT run any modern games. And if it somehow does, it will be an unplayable mess. It *might* be ok for games from the early to mid 2000s but that's probably about it. If you want to run newer games like GTA V, Battlefield, PUBG,Fortnite, etc you will need to get a much modern computer.
It's old. I assume "computer within a box" means a desktop computer, which was standard until laptops and tablets took over. You'll have trouble with games that require highly responsive video or very fast processing. Less demanding games may be OK. You also have an outdated OS. You may find recent games that the computer's hardware can handle but aren't compatible with Win7. Also Microsoft will stop supporting Win7 in January 2020, after that there will be no new security patches and the computer will be at risk.