Updating drivers is always a good start, but may not fix the problem. Hopefully it fixes it so we don't have to ask you bunch of questions.
Go to this link and read the description before downloading. Come back if you have problems. It will not work with Toshiba, Sony VAIO, or Panasonic notebooks http://support.amd.com/us/gpudownload/windows/Pages/radeonmob_win7-64.aspx