Fix flashing black box in Windows 10 in a few easy steps

Ivan Jenic
by Ivan Jenic
Troubleshooting Expert
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  • In this guide, we'll show what you can do when a flashing black box suddenly appears on your computer’s screen.
  • Oftentimes, this error occurs due to outdated display drivers, corrupted system files, and various system issues.
  • When encountering this kind of problems, check out our dedicated Windows 10 errors section for handy tips.
Flashing black box in Windows 10

In today’s guide, we’re going to talk about a rather unusual error in Windows 10. Namely, a couple of users reported that while they were using their computer, a flashing black box appeared on their screen.

There are a few possible causes of this problem, so be sure we’ll try to find proper solutions for them.

How do I get rid of the black box in Windows 10?

1. Check Video Adapter drivers

  1. On your keyboard, it’s time to press the Windows logo key + R keyboard shortcut to invoke the run box.
  2. Type devmgmt.msc and click OK.
  3. Find your display adapter and right-click on it.
  4. Go to the Update driver software option.go to Update driver software
  5. If the update is available, just let the wizard finish updating.

By now, Windows Updates should cover all your drivers. However, if you’re using a display driver for which Microsoft doesn’t offer any official updates, you’ll have to update the driver manually.

In case you need help with that, just follow the above steps.

Windows can’t automatically find and download new drivers? Don’t worry, we’ve got you covered.

2. Use the DISM command tool

  1. Right-click on the Start Menu button and choose Command Prompt.
  2. When you see the User Account Prompt, simply click Yes to grant admin privileges to the CMD window.
  3. Enter the following line and press Enter:
    • DISM.exe /Online /Cleanup-image /RestorehealthDISM command tool to fix flashing black box
  4. Let DISM scan your computer for errors and find possible solutions.

Maybe some corrupted system files are the very core of this flashing black box issue, so you can try scanning your computer for broken files and try to fix them.

If DISM failed on Windows 10, just check out this quick guide and set things right again.

3. Run an SFC scan

  1. Go to Search, type cmd, and open Command Prompt (as Administrator).
  2. Type in the following line and press Enter: sfc/scannowsfc/scannow command
  3. Wait for the process to finish.
  4. Restart your computer.

The next thing you’re going to try is running the SFC scan. System File Checker is a built-in feature designed to deal with various system issues, so it may help.

You’ll find detailed steps on how to run the SFC scan in Windows 10 above. scannow command has stopped before the process finished? Don’t worry, we’ve got an easy fix for you in this guide.

4. Run the Troubleshooter

  1. Go to Settings.
  2. Go to Updates & Security > the Troubleshooter to fix flashing black box
  3. Then, click Run the troubleshooter and wait for the process to finish.
  4. Restart your computer.

Windows Troubleshooter successfully deals with various problems, including the flashing black box problem. However, if you’re having trouble opening the Settings app, take a look at this article to solve the issue.

Troubleshooter has stopped working? Check this guide to solve the problem quickly!

5. Disable onboard graphics

  1. Restart your computer while holding the SHIFT button.
  2. The Advanced Startup menu will open on the boot.  Go to Troubleshoot.
  3. Now, go to Advanced Options > Startup Settings.
  4. Click the Restart button.
  5. A window with various startup options will show up. Press F5 on your keyboard to choose Enable Safe Mode with Networking.
  6. Wait for your computer to boot.
  7. Now that you’re safe in the Safe Mode, open Device Manager.Device Manager
  8. Locate your onboard graphics.
  9. Right-click it and from the menu choose Disable.
  10. Restart your computer, and check if the black box is still there.

If you have both onboard and external graphics cards in your configuration, and both are enabled, there can be some interference. So, the best solution, in this case, is to simply disable the onboard graphics card.

Before you can actually disable your onboard graphics card, let’s boot in the Safe Mode, just to avoid any potential problems.

6. Change brightness settings

  1. In the Power Options, find your current power plan and click Edit plan settings.
  2. Up next, click the Change advanced power settings option.advanced power settings
  3. Locate the Display brightness setting and make sure that you set the display brightness to 99% or 98% when your device is plugged in.
  4. Save changes and restart your computer.

Another reason for the flashing black box on the screen could be the wrong brightness settings. Setting display brightness to 100% when your device is plugged in causes this problem, so it’s best that you use a lower value.

If you’re aware of other solutions or need more help, don’t hesitate to contact us by using the comments section below.

FAQ: Learn more about similar Windows 10 issues

  • How do you fix a flashing cursor?

Restarting the Windows Explorer, updating mouse/keyboard drivers, and disabling Biometric Devices are all efficient ways to fix cursor blinking in Windows 10.

  • Why am I getting black squares on my computer screen?

Black square popup windows are a sign that the command prompt window is opening. The site you are visiting is infected or your own PC may have a malware infection.

In that regard, consider using some of the best antimalware tools to block threats on Windows 10. 

Editor’s Note: This post was originally published in September 2015 and has been since revamped and updated in March 2020 for freshness, accuracy, and comprehensiveness.

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