I downloaded the lastest version as of today, but when update was finished, installed one was dated 08/17
Also, I'm not sure whether version 10.18.4276 is the right one, though it reads it is for window 10.
As number starting with 10 indicates window 8 based ones as far as I know.
I wish I made some mistake while downloading & installing it. in that case, just fixing it will solve the problem, hopefully.
Thank you for your inquiry.
Drivers for the HD 4000
Also will like to recommend to check with the manufacture because according to this web site.
shows that the main GPU is NVIDIA.
Intel HD Graphics 4000 and Windows 10 & Windows 8.1 ( Brightness fix with latest driver)
Brightness Fix with Driver Date 8/17/2015 )
Brightness problem Solved
Intel HD Graphics 4000 with NVIDIA® GeForce® GT650M graphics.
Intel HD Graphics 4000 Driver, Driver Date: 8/17/2015
Driver Version: 10.18.10.4276
Make sure you backup your registry first before proceeding!!!!
open regedit in Run Command
Registry has wrong value:
Currently reads as :
"Edit DWORD 32 bit"= f000
Registry with New Value:
You needed to change the value in registry to: ( f008 )
"Edit DWORD 32 bit"= f008
Then Restart Computer
Brightness Fixed with Latest driver.
Let me know if this was helpful to you