How to fix Avast error code 0x8009000bu?

How to fix Avast error code 0x8009000bu?

While using any Antivirus, you might come across some issues. The Avast Antivirus is a very efficient and robust software. It is being utilized by several users all over the world. However, you might encounter some error codes while using the Avast Antivirus. You might, obviously, find such errors to be annoying. One of the errors that pop up pretty often is the one with the code 0x8009000bu.

On this page, we shall look into the steps to fix the Avast error code 0x8009000bu.

The error under discussion usually pops up on a particular device when you have not synced and backed up data with your Avast account on other devices. In certain other cases, this error pops up during the boot-time scan.

Now, let us see the troubleshooting methods to solve this problem.

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Method 1: Trying simple fixes

  • Step 1: If you have any other security software installed on your computer, try disabling it for some time. If you have a firewall, turn that off too. You need to do this because other security programs might conflict with the Avast Antivirus.
  • Step 2: If you are using a Windows computer, turn off the Real-Time protection feature on Windows Defender.
  • Step 3: In case the above simple fixes fail to work, move on to the next method to fix the Avast error code 0x8009000bu.

Method 2: Using the Repair button in Avast

    You can try solving the problem by using the Repair button in the Avast program. Follow these steps to do the same:
  • Step 1: On your computer, you have to open the Avast user interface.
  • Step 2: Click on Menu and then go to Settings.
  • Step 3: Now, click the General tab. Navigate to the Troubleshooting section.
  • How to fix Avast error code 0x8009000bu?
  • Step 4: In this section, click on the Repair button.
  • Step 5: Restart Avast and check if the error code is fixed. In case it persists, move on to the next troubleshooting method.

Method 3: Uninstalling and Reinstalling Avast

  • Step 1: On your Windows computer, navigate to the Control Panel window and continue with the steps to resolve the Avast error code 0x8009000bu.
  • Step 2: Go to the Programs and Features section.
  • How to fix Avast error code 0x8009000bu?
  • Step 3: Locate the icon for the Avast program. Right-click on this icon.
  • Step 4: From the displayed options, choose Uninstall.
  • Step 5: In case you are unable to uninstall the Antivirus program, try using the Avast removal tool. This tool will help you delete the Antivirus completely from your computer.
  • Step 6: Once the uninstallation is over, restart your computer.
  • Step 7: Now, download the latest version of Avast from the official site onto your computer.
  • Step 8: Install the downloaded software on your computer.
  • Step 9: Now, check if the error code pops up once again.
  • Step 10: By now, you have now successfully fixed the Avast error code 0x8009000bu.