Good Day Suryaansh,
I appreciate your time getting back to this thread, you can try to change the display scaling.
Here's the steps you can try.
-Click Start, type Task Manager and open it
-Click on Processes Tab
-Look for Windows Explorer
-Right click and hit Restart.
-Open Settings
-Click on Display
-Find the Scale option and pick a new value from a drop-down list
-Try the Recommended or 125%
-Try to set as well the display resolution.
Check if the black bar will disappear.
Restart and check.
If issue persist, let's download the updated driver
What is the exact model of your computer?
To check the system model proceed with these steps.
-Press Windows key + R
-Type msinfo32 and hit enter.
-Look for the System Model and Manufacturer and post it here.
Have a wonderful day ahead and stay safe.
Sincerely,
Carlo T.