Hi. I'm David, and I'm happy to help you.
Have you checked your monitor settings?
Monitors usually have settings that allow you to adjust the screen. The setting you will need to use will depend on the type of connection your monitor is connected to the computer (VGA/HDMI/DVI/DisplayPort).
If necessary, refer to the monitor's manual.
If you can't do that, let me know the manufacturer and model of the monitor.
Also, send a screenshot of your system information.
- Press "Windows + R", type msinfo32 and press Enter.
Maximize the window and use the shortcut "Windows + Shift + S" to use the screenshot tool.
Feel free to ask back any questions.