Why doesn't Update for Windows Security platform - KB5007651 (Version 10.0.29628.1000) load?

Question

Despite having attempted various ways to load the KB5007651, the update fails (jumping immediately to 50% then100%)

Answer 1

Dear @William Fiske

If the update immediately jumps from 50% to 100% but does not appear to install correctly, I would first check whether the update is actually failing or whether Windows Update is simply reporting the progress incorrectly.

You can check the currently installed Defender platform version by opening Windows Security > Virus & threat protection > About and looking at the Antimalware Client Version and Engine Version.

You can also check the installed package from PowerShell by running:

Get-MpComputerStatus | Select-Object AMProductVersion, AMServiceVersion, AntispywareSignatureVersion, AntivirusSignatureVersion

If the installed Defender platform version is already 10.0.29628.1000 or newer, there may be nothing else you need to install manually.

You can also check the Defender operational log under:

Event Viewer --› Applications and Services Logs --› Microsoft --› Windows --› Windows Defender --› Operational

This should give you a better indication of why the platform update is not being applied.

If you can provide the Windows version/build, the current Defender platform version, and any error code from Windows Update, it would be easier to determine what is preventing KB5007651 from installing.

Answer 2

KB5007651 can appear to “install” instantly or loop even when the Windows Security platform version is already present. For this update, the first check is whether the platform actually updated rather than relying on Windows Update history.

1. Open PowerShell as Administrator.
2. Run:

Get-MpComputerStatus

3. Check the AMProductVersion or platform version shown there.
   • If it matches 10.0.29628.1000, the platform is already installed and the repeated offer is a detection/reporting issue.
   • If it does not match, the update is not actually applied.

If the version does not match, run the Windows image repair command from an elevated Command Prompt:

DISM /Online /Cleanup-Image /RestoreHealth

Then restart Windows and try Windows Update again.

If the version does match, stop trying to reinstall KB5007651. In the documented similar cases, this behavior is a “ghost” or reporting issue where Windows Update keeps offering the same Defender platform update even though the installed version is already active.

Also, if a downloaded package hash does not match the Microsoft Update Catalog listing, do not install it, because that indicates the file is corrupted or not the exact package.

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References:

• KB5007651 Version 10.0.29510.1001 - Microsoft Q&A Hello
• Windows server 2025 Std -Windows Security platform- KB5007651(Versão 10.0.29429.1000), - Microsoft Q&A Hello

Answer 3

Hi @William Fiske ,

Good day! Welcome to the Microsoft Q&A forum!

Based on your description, I understand that KB5007651 appears to progress from 50% to 100% almost immediately but does not successfully install.

Before attempting further installation methods, I recommend checking whether the update is actually missing or whether Windows Update is incorrectly reporting its status. Open PowerShell as Administrator and run:

Get-MpComputerStatus | Select-Object AMProductVersion, AMServiceVersion, AntivirusSignatureVersion

Please check the AMProductVersion value. If the installed Defender platform version is already 10.0.29628.1000 or later, the platform may already be installed and the repeated update offer could be a detection/reporting issue.

If the version is older, run the following from Command Prompt (Administrator):

DISM /Online /Cleanup-Image /RestoreHealth

Restart the PC and then check Windows Update again.

Could you please provide your Windows version/build, AMProductVersion, and any Windows Update error code? These details will help determine whether this is an installation failure or simply an update detection issue.

Thank you, and I look forward to your update.