Several reports have you that your HP monitors cannot display full-screen when you play games. A thin black bar on the displayer’s side prevents it from going full screen. When upgrading to Windows’s latest patch, this problem always occurs. However, we have some solutions to this issue. Therefore, if your HP Monitor is not showing full screen while updating the Windows, make sure to perform the fixes we have mentioned below. So, let’s get started:

How To Fix HP Monitor Not Showing Full-Screen Problem
You can easily fix the HP Monitor not showing a full-screen issue. But, to fix it, you must have to follow these necessary fixes that we have described below:
FIx 1: Reboot Your Device
Initially, you have to reboot your HP monitor along with the PC to which it is connected. We suggest this because there are sometimes happens that your HP Monitor is not working properly due to some random gltiches and bugs which prevent it from functioning. So, you can simply reboot as this helps you fix the not showing full-screen issue because it will remove all the bugs and glitches.