Go to the device manager (Start > Right Click on 'Computer' > Properties > Device Manager) and find where it says 'Display Adapter'. Right clicking on your device should yield Update Driver or Uninstall.
I suggest trying to update it first and seeing whether Windows finds the correct one for you. Failing that, uninstall it and then download a more stable one from the AMD website.
Which model are you using?
Sir, you are a gentleman and a scholar. Thank you. God bless ya Bro