Have you installed the relevant 'optional' Windows Updates? This is a must with Win7, especially in the .netframework area.
Here are the last drivers available for your graphics card: Legacy
There are different ways to install AMD driver updates on desktop computers. Some users just install the new drivers over the old drivers and have no issue.
There are some driver updates that require you to uninstall the existing drivers before you install the new....and this method is used by many (including myself) to install any driver, whether is required or not.
First download your drivers to your desktop here using steps 1-5 manually .....Do Not use automatic find and install
Use the computer control panel 'Uninstall a Program'
Select AMD Install manager:
**** For computers with Intel processors > select 'express uninstall all software including the install manager. Reboot. Install new drivers. Reboot.
**** For computers with AMD processors > select the graphics drivers and CCC ONLY to be uninstalled. Reboot. Install the new drivers . Reboot.