Resolving Windows Defender Error Code 0x80240029

You may receive the following error message on your computer when you try to update the Microsoft Windows Defender utility:

Error found: Code 0x80240029

Cause of the Error

This error message is displayed if one or more of the following conditions are true:

  • There is some problem with the Windows Update process.
  • The SoftwareDistribution folder is corrupt.

Resolution Method

In order to resolve this error, log on to your PC using an administrative username and password and then perform the steps listed in the following methods:

Method 1: Perform Manual Installation of the Windows Defender Update Definitions

Windows Defender updates are installed using the Windows Update, Automatic Updates, or Windows Server Update Services (WSUS) feature of your Windows operating system. Error code 0x80240029 may generate if there is a problem with one of the related services.

This is the reason why, to resolve the error the first thing you need to do is to try and manually update Windows Defender. To do this, first open the Microsoft Security Portal website. Then, based on your Windows Operating system, follow the instructions given on this portal to download and install updates on your Windows computer.

Method 2: Rename the SoftwareDistribution Folder

To rename the SoftwareDistribution folder, perform the following steps:

  1. Close all programs running on the computer.
  2. Open Start menu, select Run, type cmd, and then press Enter to open the Command Prompt window.
  3. At the command prompt, run the following commands to rename the SoftwareDistribution folder:
    C:/> net stop wuauserv
    C:/> net stop bits
    C:/> ren %systemroot%\SoftwareDistribution SoftwareDistribution.old
    C:/> net start wuauserv
    C:/> net start bits

Method 3: Ensure that your system is not experiencing problems related to the Microsoft Windows Update, Automatic Updates, and Windows Server Update Service (WSUS) service.

To troubleshoot problems related to these services on a Windows Vista comptuer, perform the following steps:

  1. Open Start menu and then in the Start Search box, type %\windowsupdate.log and then press Enter.
  2. Go through the log file to look for any errors listed on it.
  3. Note: You can seek help of the Microsoft Knowledgebase Web page on how to read the log file and detect any errors within it.

  4. If you find any errors in the log file, search for the solution to the specific problem on the Microsoft Help and How-to Web site by using keywords that best describe the error and then implement the suggested solution.

To troubleshoot problems related to updates on a Windows 2000, Windows XP, or Windows Server 2003 computer, perform the following steps:

  1. Open Start menu, select Run box, type %\windowsupdate.log and then press Enter.
  2. Go through the log file to look for any errors listed on it.
  3. Note: You can seek help of the Microsoft Knowledgebase Web page on how to read the log file and detect any errors within it.

  4. If you find any errors in the log file, search for the solution to the specific problem on the Microsoft Help and How-to Web site by using keywords that best describe the error and then implement the suggested solution.

Problems within the registry can cause various problems on your PC and generate errors. This is the reason why, it is recommended that you use a reliable registry cleaner tool, such as RegServe to regularly clean your registry and prevent many such errors from occurring.