Windows 10: Updated to windows 10, screen now very dim and I can't adjust it

IvanDavid1, you're a genius! My Lenovo P500's screen went dim three or four days after I upgraded to Windows 10 (July 28, 2016). I updated, installed and uninstalled drivers like others recommended, but none of them worked. I finally found IvanDavid1's solution today and it worked!!! Thank you, IvanDavid1.

 

Fixed - working now.

Windows 10 Creators Edition [Version 10.0.15063]
Lenovo IdeaPad P500 - Intel HD Graphics 4000
Fully patched with MS updates as of 2017-06-09

As with others, screen was very dim after installing Windows 10.

1. Rebooting while holding F12 helped a little.
2. Installed the latest HD Graphics 4000 driver (10.18.10.4425) from Intel's website. Didn't seem to help.
3. Used Regedit to change the following key to hexidecimal FFFF
(from the orginal F000), and I'm back to normal.
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000\FeatureTestControl

May have required doing all three steps.

Thanks to heyboon (and Google Translate on my phone for providing the Spanish website:
http://blog.teksoporte.es/2015/11/le...reglar-el.html

Mike Honeycutt

 

Open Device Manager (Search for it or right-click Start). Confirm the UAC prompt, if necessary.
Select Display Adapters and right-click on Intel HD Graphics 4000, then select Update Driver > Browse my computer for driver software > Let me pick from a list of device drivers on my computer. Choose "Display Adapters" as Device Type and select Microsoft Basic Display Adapter.[/QUOTE] - IvanDavid1
Thank you sooooo much! This worked for me and am very glad it did. Do you happen to know of any problems I may come across while using this driver?

 

My computer has been solid for six months after applying the fix. No issues at all.