Graphics error after returning from 6month inactive

What about it?

This is what the game looks like right now. I have played to 80 in wotlk classic on this device but have been inactive for 6months. Upon logging back in I find this, with an error message saying my device driver is out of date. I have tried installing a new driver following the links from Blizz. My computer says I'm using the best driver available. I am not very computer smart and don't know how this could happen or how to find a solution. Any advice will be appreciated

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