Screen Brightness Won't Adjust | Fix The Dim Backlight. This is a quick tutorial because my mom and I had this issue with our computers.
I found the solution online at http://www.tenforums.com/general-discussion/10313-updated-windows-10-screen-now-very-dim-i-cant-adjust.html so this is just the walk-through.
So you're Not be able to adjust your dimly lit computer background. This going to happen after updating to Windows 10 or maybe software issues. Here is how you fix it it's really easy. First you want to go to your control panel, and search for device manager. Click on device manager this window should pop up then you'll search for Display adapters. Usually there is only one display adapter but I have to in this case you want to select The one you're using. Right click on the display adapter and click update software here you will first automatically update the software and after that's finished you will go to update date software again and this time you will browse your computer and click let me pick. Then you want to go here DoubleClick or click next this should update your display adapter. I won't do it now because it will interrupt the recording but while it's updating your computer may act a little strange maybe blue screen or you will instantly be able to adjust your brightness. If the blue screen Persists manually restart your computer after which your brightness should be adjustable. If none of this method dude doesn't work you might be having a hardware issue. So you'll need to get your computer repaired at a Best Buy or sent to the manufacturer
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