Display problem once logged in
Hi
I have a 2015 13 MacBook Pro Retina. It boots up fine and shows the login screen perfectly fine. I type my password in and it shows the progress bar, but then as soon as it gets to the end, the screen goes scrambled, as better shown in the attached image.
I've tried restarting several times and once or twice, it shows me my desktop, but then the Apple bar at the top is missing before it eventually goes back to the same scrambled look.
Any help at all please?
Thanks
MacBook Pro (Retina, 13-inch,Early 2015), OS X El Capitan (10.11.1)