New Nvidea drivers caused problems with my HP laptop. Downloaded the recommended drivers from the Nvidea site as prompted by Windows 10 and the system became very unstable with blank screen and the whole system locked up.
Reverted to basic on board graphics and removed the Nvidea drivers and went to HP's website where I downloaded their set of driver files. Reinstalled the HP version and everything was fine, except for the message from Nvidea that popped up suggesting that a newer, better set were available from their site.
DON'T DO IT!
The drivers supplied from Nvidea and with Windows are generic versions that kind of work with many machines, but the computer manufacturers are responsible for fine tuning and making sure the graphics drivers actually fully work with their products. Stick with the HP drivers and things work. Upgrade(?) to the latest and greatest versions on the Nvidea site and problems arise.