Based on my previous experience, Windows may display a resolution using a different frequency than your monitor natively supports. By changing the display frequency, you may fix the black border problem.
Windows 10 Anniversary Edition in particular supports a much wider range of display frequencies (Hz), which was not previously accessible in earlier versions of Windows 10.
If the optimal resolution isn't supported by Windows 10 and downloading the latest video card driver doesn't help, the other thing you can do is make sure that you have Windows 10 Anniversary Edition installed and to try adjusting the display frequency.If that does not fix it, try the next step. In that case, try downloading the latest video card driver to fix the problem and try again. If Windows 10 does not list your optimal resolution, then that means Windows does not support your display properly - which is why you see the black borders on the display. Once you know what those specifications are, try and get the monitor into that particular resolution and that particular frequency. The only way to know what your monitor's optimal display resolution might be is to type in the exact make and model # into Google and research the monitor / display specifications online. If you're using a laptop, the resolution may be different - for example, 1600x900 60 Hz. Optimal display of 1920 x 1080 60 Hz by default, which is the same resolution as a Blu Ray movie. Many computer and laptop screens today will have an Ensure that you are using the optimal screen resolution for your display.If you are using a laptop, then you won't have an "auto calibration" or "auto" button because laptops automatically calibrate themselves. Note that the "auto" or "auto calibration" option may hidden deep inside the On Screen Display (OSD) menu - if - you have an on screen display (usually accessible from the "menu" button if you have it). If you can somehow access the "auto calibration" or "auto" button on the monitor, this will instantly fix the black border problem. In this case, Windows is most likely outputting the display resolution * OR * display frequency in a different mode than your previous version of Windows, and therefore you are now seeing black borders around your screen. First check and see if you have an "auto calibration" or an "auto" button on your monitor, because this will fix the black border problem instantly without you having to make any further adjustments.
Here are a few things you can try to eliminate the black borders around your screen: The ability to change the display frequency oftentimes will remove the black border around the screen, but not always. Since I wrote the article "How to Fix: Windows 10 Black Border (Shrinking Screen)", Windows 10 Anniversary Edition has now been released, which allows the user to change the display frequency.
How to Fix: Windows 10 Black Border (Shrinking Screen) - Using Display Frequency If you have an Nvidia video card, then read this article instead. It will say what make and model you have. A new window will appear click the "Display Adapters" option to expand the list. You can find out which video card you have by doing the following: 1) click Start, then type in "device manager" (no quotes) wait for Device Manager to appear in the list, then click it.
If you do not see the "DALR" registry attributes I mentioned in this article, then that usually means one of