[CRASH] CLIENT KEEPS CRASHING AND LAPTOP FREEZES

Every 1 in 3 games, my computer freezes once the game client starts and the only way to recover is to restart the PC. I have no idea as to why this error occurs. Here is the look : the https://gyazo.com/e668ce21f881ba84d3f252c55f4fff57 I've seen that this is the same error that comes up while trying to open the league game client while it's already running. If I continue towards creating a dump file, it gives another error that there is not enough memory to do so. Other games run just fine and I've played some even heavier games. This never happened even a few weeks ago, but it's happening very very frequently from the past week. Please fix this. Playing a game is so much risky now.