Game Freezes?

Hi Guys!

So just recently fixed my internet issues and my extended Wi-Fi connectivity. Now I'm facing a random problem that I have no idea what's going on. My computer randomly freezes in game after working completely fine. It'll be right before a fight, or right after. It completely freezes my entire computer and I have to quickly restart to go back into the game. Does anyone know why that is??? I appreciate your time!!! Thank you.