For the games that you play, I think your pc isn't very bad.
Well, probably my laptop is crap, but for 200€ (New, on store) i think it wasn't bad, I can run Minecraft and other games (and old games, which I like )
Specs:
RAM: 4GB
Processor: Intel(R) Celeron(R) CPU N2840 @ 2.16GHz 2.16 GHz
Intel(R) HD Graphics
Windows 8.1, 64 bits
My pc runs Minecraft, Warface, GTA San Andreas, 7 Days to Die, Sims 4, PES 2013, Euro Truck Simulator 2, etc.