Windows 10 stuck on 0% brightness setting.

Hi,

I apologize for the inconvenience. As you are using Windows 10 on boot camp on your MacBook pro, I suggest you to get in touch with Boot Camp support in this regards.

https://www.apple.com/support/bootcamp/

Thank you.

This solution would work if you had Boot Camp installed, and the "Keyboard" tab on the "Boot Camp Control Panel" appropriately checked.  Otherwise, its probably a point of no return. If you had your Boot Camp keyboard settings appropriately ticked, all you need to do is press "fn + F2" keys.

To have the keys working you need to do the following:

1. Click on the Boot Camp icon ( The black square...that appears on clicking the arrow head)

2. Select Boot Camp Control Panel.

3.  You need to have the " Use all F1, F2..." checkbox ticked.

With the Boot Camp Control Panel configured in the above way, "fn + F2" will work. 

P.S. I am the same person posting this request for help. I posted it at about 1:35 AM Indian Standard Time. And been freaking out in my bed. I could hardly sleep.

Like suggested by Guru Kiran G. below ,I called Apple care India, where they assured every kind of help possible in their reach. But couldn't find a solution and tried to convince me to talk to Microsoft India support (and even generously found me Microsoft's support phone number). And then I called Microsoft India support, where again I was told that they cannot offer help regarding dual boot since the liability lies with the hardware manufacturers. So I am back to square one. Freaking out even more. If you have reached where I am, trust me, you are on your own.

No support staff has any idea about this issue. I am really frustrated with the hours of helplessness.

Hi,

I apologize for the inconvenience. Thank you for providing the above information, which will help other users.

Regards,

Guru Kiran