How to Fix Green Lines on Windows 11 PC

Seeing flickering lines on the screen, either horizontally or vertically, is pretty annoying. Most of the time, our first thought is that the computer has crashed or the monitor is broken.

Usually, these lines are red, black and green, but they may have a different cause. If it is horizontal green lines, read on, as I will introduce several common ways to solve the green line.


01 Differentiate whether it is a hardware or software problem

Computer screen display green horizontal lines may be due to hardware or software problems, so you are supposed to first ascertain whether the problem is related to hardware or software in order to apply the proper methods to troubleshoot it.

1) First, unplug the monitor cable, and then re-plug it in to see if the monitor is back to normal. If it does not work, first try to use the Device Manager to remove the driver for the monitor.

2) Press Win + X on your keyboard and select Device Manager, open it and expand the Monitors section.

3) If you have other monitors, you will notice several entries here, find out the model number of the problematic monitor, then use the right-click menu and select Uninstall.

4) After removing the monitor driver, restart your computer. The monitor driver will be automatically reinstalled after a reboot. If the monitor driver is the cause, this should fix the problem.

uninstall devcie

If the problem seems to be related to hardware, you can try a different set of monitor connection cables. You can also connect the monitor to another computer and see if the problem is resolved. If the other computer also shows green lines, ask a professional technician for help to see if it needs to be repaired or replaced.


02 Upgrade the graphics driver

Using outdated or incompatible drivers may cause problems with the display. Therefore, you may try to update the drivers on your computer.

After determining the manufacturer, model, OS version and system type of your graphics card, download the GPU drivers manually from the manufacturer’s website (such as AMD or Nvidia). But actually, the task of upgrading drivers you can just leave to the professional driver software. Driver Life will automatically update all device drivers to the latest version, no need to do your research to do it.

You can simply leave the task of updating drivers to the professional driver software, Driver Talent. The software will automatically update all device drivers to the latest correct version without the need to research manually.

1) You can download and install Driver Talent on your computer.
2) Run it and click Scan. Then Driver Talent will search for your computer with the missing or corrupted drivers.


3) Click Install All to get drivers updated.

Install All

Then you will see Driver Talent update your outdated and corrupted drivers easily and quickly for your computer, which may fix the screen flickering issue.


03 Adjust the screen resolution

If your monitor is set to the wrong resolution, green lines will appear. Search your monitor model online or find the user manual to find the right resolution. Different sizes of monitors fit different optimal resolutions.

Once you are aware of the idea resolution, take the following actions:

1. Hit Windows+I on your keyboard to open Windows Settings.

2. Go to System > Display and scroll down in the following window.


3. Expand the “Change the size of text, apps, and other items” drop-down menu and select 100%.

4. Next, expand the dropdown for the Display resolution and select your monitor’s preferred resolution.

Display resolution

04 Update BIOS

BIOS, short for Basic Input / Output System, controls your computer boot process. When it is outdated, it may cause some display issues, so you’d better update it to the latest version.

1. Press the Windows+R key on your keyboard to open Windows Run dialog

2. Type cmd, and hit Enter key to open Command Prompt.


3. Right-click on Command Prompt and choose Run as Administrator.

4. In the Command Prompt, type the command, wmic bios get smbiosbiosversion, and hit Enter key. The above command will display the BIOS or UEFI firmware installed on your PC.

wmic bios get smbiosbiosversion

5. Once you have the BIOS version, open the OEM’s website.

6. Visit the download center and then enter your pc details.

7. On the download page, check if you have a BIOS update available for your computer.

8. Download the BIOS and file and extract the Zip file.

9. Open the readme.txt file and follow the instructions to update BIOS.

Once your finish these steps, check if green lines on your computer are gone.


Bottom Line

The green line problem is related to the monitor, and it may be caused by hardware or software problems. I hope these methods can help you eliminate those pesky green lines. If you still have any questions, don’t hesitate to make comments below.

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