I stopped playing games for short time of about 5 months on my Dell G7. The laptop also has a 16 gig RAM. But as soon as I restarted my gaming (AC: Odyssey), there is severe lag. Not just this; even other games are lagging severely, I reinstalled the graphic card drivers, restarted and it was totally fine. Again today, when I started playing the game, there is severe lag. The FPS gets really low like 15. Any ideas what might be happening? It was perfectly fine a few months ago.