Changing any setting crashes the game.

So changing any game setting other than sound makes the game crash. I have tried disabling 3 of my 4 monitors no fix.
The game is stuck at the lowest possible resolution which doesn't look to good, The graphics are ultra low
And its almost unplayable I am unable to read anything with out changing and resulting in a crash.

try delete cache, wtf etc and retry (back them up somewere first)
if that doesnt work, try make changes in windowed mode.

failing that, you can open the config file in your wow directory within notepad, use word wrap and change the settings from there

same problem but options not used arent in the file they get created as you make changes