I have a PC connected to a TV that I have previously used the nightlight setting in windows 10. I noticed tonight it was off, so I switched it on and something very strange happened. Instead of dimming the blue light windows seems to be dimming blue and red. The picture turns green. What on earth has happened? I believe there is a registry key that controls this, is there something I can do to sort it out?

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I have noticed one other very recent complaint about this that I found doing a search. None of the fixes in that thread worked.

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Ah OK I found this on an NVIDIA site....

GeForce Hotfix Driver Version 451.85

Updated 07/24/2020 10:12 PM

GeForce Hotfix Driver Version 451.85


GeForce Hotfix display driver version 451.85 is based on our latest Game Ready Driver 451.67.

This Hotfix driver resolves the following issues:

  • [Shadow of the Tomb Raider][DirectX 12]: The game may crash when launched with Hardware-accelerated GPU scheduling enabled.
  • [Death Stranding]: Texture corruption may be observed during gameplay on GeForce GTX 16/RTX 20 series GPUs
  • NVIDIA Control Panel does not display the native resolution of some HDTVs with invalid timings
  • Some games may exhibit random freezes that lasts for a few seconds during gameplay.
  • Some displays may show a green tint when Windows Night Light is enabled
  • [Forza Motorsport 7]: Game starts to stutter after racing a few laps
  • [G-Sync Compatible] Adds support for the Samsung 27" Odyssey G7 gaming monitor

Windows 10 64-bit Standard Driver - Click Here
Windows 10 64-bit DCH Driver - Click Here

For assistance with choosing between Windows 10 Standard and DCH display driver, please visit the FAQ below:
NVIDIA DCH/Standard Display Drivers for Windows 10 FAQ