Download the real thing instead of the autodetect tool.
If you have a fairly recent desktop card (5k and above), go here.
If you have an old card (or even for new ones), go here. Select the OS and card type, not the autodetect option.
For laptop/mobility drivers visit the website of the manufacturer (OEM) that made the laptop. Get the customized drivers from them.
CPU: AMD Phenom II X4 810 @ 3120MHz | RAM: Kingmax 2x2GB DDR2 800 @ 833MHz| MoBo: MSI K9A2 CF v1.0 (BIOS: 1.D)| GPU: Asus HD 6850 1024MB (DirectCu) @ 835/1135MHz | Display: L24FHD | PSU: PC Power & Cooling Silencer 750 Quad | OS: MS Windows 3.11 Pro x64