Microsoft Windows Update 0x8024002A: missing scan handler

Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.

1. 1

   Generate WindowsUpdate.log and inspect the component and {GUID}.revision on 0x8024002A

   Tools required

   Who:

   You or your IT administrator in Windows PowerShell.

   How:

   Run the Get-WindowsUpdateLog cmdlet to convert the ETW trace files under C:\Windows\Logs\WindowsUpdate into a static WindowsUpdate.log file, then search for 0x8024002A and note the component column (such as EEHandler or HANDLER) and the {GUID}.revision identifier.

   Result that matters:

   You see whether 0x8024002A occurs while evaluating one specific update {GUID}.revision or across every scan.

   If 0x8024002A appears repeatedly on the same {GUID}.revision, that isolates the failure to that specific update revision and the update source publishing it.

   If 0x8024002A aborts the scan globally across all updates, that points to a missing or outdated Windows Update Agent detection component on the PC.

   Evidence to keep:

   Save the matching lines from WindowsUpdate.log showing the timestamp, process/thread ID, component name, and {GUID}.revision.

   Do not delete %WINDIR%\SoftwareDistribution\Datastore\Datastore.edb before saving the log, because Datastore.edb maps the local IDs used by the client.

   Evidence: Windows Update error reference · Windows Update log files

2. 2

   Check which update service source has OffersWindowsUpdates set to True

   Tools required

   Who:

   Your IT administrator or you in an elevated Windows PowerShell window.

   How:

   Run $MUSM = New-Object -ComObject "Microsoft.Update.ServiceManager" followed by $MUSM.Services and check the Name and OffersWindowsUpdates output columns.

   Result that matters:

   You identify whether the PC scans against Windows Server Update Service (WSUS) or directly against Windows Update / Microsoft Update.

   If Windows Server Update Service shows OffersWindowsUpdates as True, that indicates the client is managed by WSUS and the administrator should verify the published revision and client self-update on WSUS.

   If Windows Update or Microsoft Update shows OffersWindowsUpdates as True, that rules out an intranet WSUS server and focuses troubleshooting on the local Windows Update Agent.

   Evidence to keep:

   Record the exact Name and OffersWindowsUpdates output lines from PowerShell.

   Run only the read-only ServiceManager query; do not unregister built-in update services from the datastore.

   Evidence: Windows Update log files · Windows Update issues troubleshooting

3. 3

   Run the built-in Windows Update troubleshooter and check for pending restarts

   No special tools

   Who:

   You signed in to Windows with an active internet connection.

   How:

   Select Start > Settings > System > Troubleshoot > Other troubleshooters, locate Windows Update, and select Run; if Start > Power shows Update and restart, complete the restart and select Check for updates.

   Result that matters:

   The automated troubleshooter checks the Windows Update service state and pending self-update operations.

   If the scan completes after the troubleshooter and restart without 0x8024002A, that confirms a transient agent or pending-reboot state was blocking detection.

   If 0x8024002A returns on the next scan, that rules out a simple pending restart and confirms the need for manual package testing or administrator escalation.

   Evidence to keep:

   Keep a screenshot of the Windows Update troubleshooter result and the timestamp of the retry scan.

   Evidence: Microsoft Windows Update troubleshooting · Update the Windows Update Agent to the latest version

4. 4

   Test manual installation of the affected KB from the Microsoft Update Catalog

   Tools required

   Who:

   An advanced user or IT administrator testing a single failing KB.

   How:

   If a specific KB number is identified, search for that KB in the official Microsoft Update Catalog, download the matching architecture package, and double-click the package to test manual installation.

   Result that matters:

   Microsoft states that testing whether the update installs manually separates a WSUS/detection issue from an installer package failure.

   If the update can be installed manually from the Microsoft Update Catalog, that confirms the issue lies in WSUS or Windows Update scan detection rather than the update payload itself.

   If the manual package also fails to install, that indicates a deeper servicing stack or component error; note the new error code for support.

   Evidence to keep:

   Record the KB number downloaded, the OS architecture matched, and the manual installation result.

   Microsoft states that only advanced users and administrators should download updates from the Microsoft Update Catalog; never download update packages from third-party websites.

   Evidence: Determine whether WSUS configuration causes WU installation failures · How to download updates that include drivers and hotfixes from the Microsoft Update Catalog

A code is meaningful only inside the right product and version context.

In Microsoft's Windows Update error reference, 0x8024002A maps to WU_E_MISSING_HANDLER: a component required to detect applicable updates was missing. During a scan, the Windows Update Agent evaluates update applicability rules (including detector updates that carry only an IsInstalled rule); in WindowsUpdate.log, EEHandler evaluates applicability rules and HANDLER manages update installers such as CBS. Microsoft does not name which specific handler binary failed in the table, so code 0x8024002A alone does not prove disk corruption or require wiping the local datastore before inspecting the log.

• Mediumsource verified

  Before trying advanced Windows Update repairs such as clearing C:\Windows\SoftwareDistribution or running command-line servicing tools, make sure you back up your personal files to an external USB drive or OneDrive as instructed by Microsoft.

  Evidence: Microsoft Windows Update troubleshooting

• Lowsource verified

  Never disable Automatic Updates or download standalone update packs from unofficial sites to work around 0x8024002A; disabling Windows Update prevents the Windows Update Agent from receiving required self-updates.

  Evidence: Update the Windows Update Agent to the latest version · How to download updates that include drivers and hotfixes from the Microsoft Update Catalog

1. 1

   Windows Update error reference

   Microsoft · 2026 · official_doc