Game crashes after champ select

After i updated my laptop, my games started to crash. i can open the client and go and select a champ fine but as soon as i start to load the screen goes black and sign comes up saying "cannot connect to server" theres no error number. i have looked up for the last two days how to fix it but i cant find anything. iv changed resolution. iv deleted Logitech files. iv uninstalled and reinstalled, iv repatched, iv even downloaded hextech repair tool. and iv turned firewall on and off and nothing. it has nothing to do the internet as my brother can play perfectly fine. Riot pls help