There is no official driver. Windows usually installs a "Microsoft Basic Display Adapter" or a legacy WDDM 1.1 driver via Windows Update .
The last official version is Catalyst 13.1 . Windows XP: The last official version is Catalyst 14.4 . 2. Official Download Source skachat draiver radeon hd 3750
If you are upgrading or fixing a broken driver, use Display Driver Uninstaller (DDU) first to remove old files. There is no official driver