Did you check with the laptop manufacturer before you updated to Windows 8.1 ? Not all laptops will support it...especially older ones. If they do support it, there is probably a bios update and new drivers for your model. Use them. Please read "UPDATING MOBILITY DRIVERS" ..especially the part about
If installing an operating system other than the one currently supported by the notebook, the notebook may not meet all requirements. As such supported graphics drivers may not be available.
The AMD Mobility Radeon Driver Verification Tool will display the following error if it fails to validate the graphics hardware.
“AMD Catalyst Mobility cannot be downloaded due to incompatible hardware/software on your computer. Your computer does not contain a proper graphics adapter.”
This is due to incompatible hardware/configuration in your notebook. Please contact the notebook manufacturer for assistance. "
Intel I7 960 @ 3.87ghz *Intel DX58SO *AMD R9 290 4gb *Corsair TX650M *2x4gb Corsair XMS3 *WD Black 1TB *Windows 7 Home Premium 64bit ***Asus N71Jq laptop *Intel I7 720QM Processor *Mobility Radeon HD5730 1gb *8gb Ram *Windows 7 64bit ** Toshiba P75-A7200 * Intel I7-4700MQ * Windows 8.1 64bit
***** cetera fallunt, ludere mortuus ******