Constant Bug Splat

Played a few games on PBE Ranked Solo Queue without incident, but on my 4th game the screen resolution changed. When I went to change it, I thought it would be a good idea to change the rest of the settings to what I use on live (Very Low on everything but champs so my computer doesn't die). Immediate bug splat, then 3 times more throughout the game (sometimes not even letting me load back in before it crashed again). I finished the game and tried to spectate a ranked game and it crashed again. My teammates reported experiencing the same thing. I uninstalled and reinstalled the client and that seems to have worked. Need up in this laptop.