black screen after installing Intel HD Graphics 4600

As soon as I install Intel HD Graphics 4600 in my Dell Precision M3800, the screen goes black and after rebooting, it goes black again right after Windows is booted.

Here is everything I tried:

• clean installed Windows 8 (original Dell USB drive recovery media)
• clean installed Windows 10
• install all Windows Updates and drivers from Windows Updates
• Install latest (2015) drivers manually from dell.com (M3800_Video_Driver_7C6X2_WN32_10.18.15.4248_A00.exe)
• Install latest (2017) drivers from intel.com (Intel HD Graphics 4600 15.40 2017 win64_154036.4703.exe)
• let Dell System Detect install drivers automatically
• In Safe Mode, in Registry, set "DisplayOptimizations" to 0x0  and "NoFastLinkTrainingForeDP" to 0

RESULTS: all the same, screen goes black as soon as Intel HD Graphics 4600  is installed and remains black as soon as Windows is booted, no matter how many times you reboot.

NOTES:

1. I restored Windows from Advanced Startup Options each time screen would go black as a result of installing Intel HD Graphics driver, sometimes restore failed, and I clean installed Windows from USB media.
2. screen works fine in Safe Mode and if I disable Intel HD Graphics 4600 in device manager, Windows boots normally and screen works. 
3. I could live with builtin Microsoft Basic Display Adapter driver (1920x1080) but the the problem is screen brightness is stuck at maximum and there is no way to change it! 
4. I can use the laptop using TeamViewer remote desktop control when Intel HD Graphics 4600 is installed and the display is black. I discovered the following: Under Advanced Display, using old driver from dell.com, there is all the supported resolutions, but changing it to 1920x1080 does not stop the black screen.  also no monitor is available in Intel HD Graphics settings. 

How could I install graphics driver in this? or is there any alternative for adjusting the screen brightness without installing graphics drivers?