Problem resolved
Thanks for the information Wim, windows update was telling me the best driver for the display was already being used (Standard VGA display driver)
But that did not sound like the best driver for the HD card installed, so I downloaded the manufacturer's (ATI) correct driver and it works like a charm.
I assumed since Windows Update was telling me the best driver was being used it should be WDDM, this appears not to be the case.
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