Avast Boot Scan Error Code 0xc000009c

Avast Boot Scan Error Code 0xc000009c

To secure your computer from malware and other threats, you might have installed the Avast antivirus software on your computer. This software has a feature to scan your computer when it starts. The feature is known as Boot-Time Scan. When you schedule a Boot-Time Scan, the Avast antivirus scans for malware in your operating system when it is started the next time.While running a Boot-Time scan using Avast antivirus on your Windows computer, if you receive the Error 0xc000009c, then it is related to the system files damage on your computer.

Some solutions given below will help you troubleshoot the Avast Boot Scan Error Code 0xc000009c.

Solution 1:

The error code 0xc000009c might have been triggered by the third-party drivers or the drivers that have not been updated. To update the drivers on your Windows computer using Windows Update, follow the below steps.

  • Click the search icon on your Windows computer from the Start menu.
  • In the search box, type 'Control Panel' and then press the Enter key.
  • From the options in the control panel, select and click the Windows update icon.
  • Now, click the Check for updates option on the left side of the Windows Update window.
  • The wizard will scan for updates available and will list the number of updates available to be installed.
  • Click on the updates and click the Install button.
  • Once the drivers are updated, restart your computer.

Try the Avast Boot-Time scan again.

Solution 2:

To troubleshoot the Avast Boot Scan Error Code 0xc000009c, you can perform an SFC scan on your Windows computer. The steps for the SFC scan are given below.

  • Click the Windows icon and then type cmd in the search box to open the terminal.
  • In the command prompt, type 'sfc /scannow' command and press the Enter key.
  • Once the scan is completed, try the Boot-Time scan again.
  • If the SFC scan returns corrupted files, then fix those corrupted files manually.
Avast Boot Scan Error Code 0xc000009c

Step 3: Reinstall Avast Antivirus

You can uninstall the Avast antivirus on your computer either using the Avast Uninstall Utility or the Control Panel on Windows computer.

To uninstall Avast Antivirus software on your Windows computer using Control Panel, follow the below instructions.

  • On your Windows computer, click the Start menu and select the Control Panel option.
  • Then, under the Programs option, click on the Uninstall a program option.
  • This will list all the applications installed on your Windows computer.
  • From the list, click and select the Avast antivirus.
  • Click the Uninstall button.
  • Carry out the on-screen instructions to complete the uninstallation.
  • Once you complete the uninstallation, restart your Windows computer.
  • Now you have to install Avast antivirus on your Windows computer. To do this, carry out the below instructions.
  • On your computer, download the Avast antivirus installation software setup file.
  • Right-click on the setup file and select the 'Run as Administrator' option.
  • If the User Account Control prompts you for permission, then click the Yes option.
  • In the Installation setup window, click the Install button to initiate the installation.
  • The installation process will consume some time to complete.
  • Now, click the Get Started button. Click the 'I Agree' button.
  • In the next window, click the Activate button and enter the activation code that you have received while you purchased Avast antivirus software.
  • Finally, click the 'Run First Scan' button.

If the methods specified above did not work, then try the alternative solutions given below.

Solution 1:

Your system might have been corrupted with the virus, which is not allowing the activation process. So try to scan your computer with the in-built Windows Defender.

Solution 2:

In some cases, if the drivers on your computer are not updated, then it may trigger such Avast Boot Scan Error Code 0xc000009c in your antivirus program. So check your Device Manager for updates and update all those drivers.

Solution 3:

If your computer has another antivirus software running, then that would block Avast antivirus. So, uninstall the other antivirus and then try to activate your Avast antivirus.