[CLIENT] Client keeps crashing and disconnecting randomly

Recently my game client has been disconnecting randomly and will at times completely crash. My game runs fine and I haven't had any issues with it crashing in game. The problem has only been in my client window and I will get the notification "Disconnected from PVP.Net," and it will happen in game lobbies as well and in one case it booted me from the lobby. I have checked my internet and I have not been having any issues outside of the LoL client. My fiance also has the same computer build as me and his runs LoL fine. I am unsure what I can do to fix this problem and any advice would be greatly appreciated!