Connections/Reparing

My client is constantly crashing. I am also being removed from my parties when I am loading into the game. It then says that it is repairing the client. Is it just my computer or is it the client compatibility. I looked into this on the support page, but I wasn't sure where being removed from the party and game fits. I lose LP and get listed for AFK behaviors even though it's out of my control so I'd like to know if there's a solution.