

Open the System applet and then click the Advanced system settings link to the left.

Then, stop Windows 10 from updating drivers: Right-click the Start button and select the Control Panel entry in the context menu.

Have to roll back the driver or try to reinstall the 8.1 driver from lenovo for the p500 at When working on a P500, I ran into this when Windows updated the driver. I believe this is because the hardware isn't compatible with the updated display driver, and the hotkeys for brightness stop working.
