My client has been a mess

My client has been extremely obnoxious lately. Will randomly complete freeze eventually causing windows to shut it down. During my process of making a screen shot it happened so i made a screen shot of a screen shot.

The client will go completely blank or will fade into my wallpaper becoming completely unable to click on. Really would like to be able to play a series of games rather than the client crashing before and after every game. Thank you.