In order to adjust brightness on a mac or iMac running Windows, go to the Control Panel and double click on ‘Display’.

Now, navigate to the ‘Settings‘ tab and click on ‘Advanced‘, you should see the following screen.

Then click on ‘Start NVIDIA Control Panel’, and select ‘Advanced Settings’. Now, from the NVIDIA control panel, click on ‘Adjust desktop color settings’ to the left. From the sliders to the right (in the same window) you should be able to change the ‘Brightness’, ‘Digital Vibrance’ and ‘Contrast’ to change or reduce the brightness of your screen.

I hope you find this tip useful, do let us kow if there are other easy ways of changing the brightness on a Mac running windows.