I have a problem with Microsoft Windows 10 upgrade on a VAIO 64 bit Laptop. Everything went smoothly except that the screen brightness was uncomfortably low after the upgrade. The Fn F6 brightness control on the keyboard shows the display set to the maximum, but despite that, the brightness is low. We tried the default driver, which gave good brightness but limited the resolution to 1024 X something. At this resolution, parts of the screen are not visible to me and it is impossible to work with. Then we checked for updates to the default driver and it found an update for the Intel HD graphics driver and installed it. Now we are back in the same state as before, with a dim display, but full resolution.
Comments and suggestion would be highly appreciated.