Latest update won't install

If Windows remains responsive and the update is only showing “Installing” in Settings, restart normally and run the Windows Update troubleshooter; do not interrupt the PC if it is already displaying a full-screen update or restart phase.

Microsoft currently lists no known installation-hang issue for KB5132061, so the absence of a published widespread issue means standard Windows Update recovery is the appropriate starting point—not that the cause is necessarily local. Build 26300.9974 corresponds to Windows 11 version 26H2. ^1^

1. Restart and run the troubleshooter

1. Save your work and select Start > Power > Restart.
2. After signing back in, open: Settings > System > Troubleshoot > Other troubleshooters.
3. Next to Windows Update, select Run.
4. Restart when it finishes.
5. Go to Settings > Windows Update > Check for updates. ^2^

If the update is still stuck, continue below.

2. Clear the downloaded update cache

This removes downloaded update files, not installed updates.

1. Press Win+R, enter services.msc, and press Enter.
2. Right-click Windows Update, then select Stop.
3. Open File Explorer and go to: C:\Windows\SoftwareDistribution
4. Delete the contents of that folder.
5. Return to Services, right-click Windows Update, and select Start.
6. Restart the PC and check for updates again. ^3^

3. Repair Windows servicing files

Open Command Prompt as administrator and run these commands in order:

DISM.exe /Online /Cleanup-image /Restorehealth
sfc /scannow

Wait for each command to finish. Restart, then retry Windows Update. Microsoft documents successful DISM completion as “The restore operation completed successfully” or “The operation completed successfully.” ^3^

4. Verify the 26H2 prerequisites

KB5132061 on Windows 11 26H2 requires:

• An update released on or after September 22, 2026, such as KB5124010.
• Servicing stack version 26100.9539 or later. ^1^

To inspect the servicing stack, open Command Prompt as administrator and run:

DISM /Online /Get-Packages | findstr /i "ServicingStack"

The returned package identity must show version 26100.9539 or later.

5. Install KB5132061 manually

First open Settings > System > About and check System type. Download the Microsoft Update Catalog package matching the PC’s architecture—normally x64-based or Arm64-based—rather than assuming x64.

If the Catalog download provides multiple .msu files, Microsoft specifies this order:

1. windows11.0-kb5043080-x64_...msu
2. windows11.0-kb5132061-x64_...msu

Double-click them in that order. If the checkpoint update is already installed, Windows will report that it is already present. For an x64 package placed in C:\packages, Microsoft also documents this elevated command: ^1^

DISM /Online /Add-Package /PackagePath:C:\packages\windows11.0-KB5132061-x64_.msu

Use the actual downloaded filename. For Arm64, use the matching Catalog package and its filename; do not use the x64 package.

If installation still fails, note the exact error code under Settings > Windows Update > Update history. That code is needed to distinguish servicing corruption, storage, driver, permission, and update-database failures.

References

1. Windows 11, versions 25H2 and 26H2
2. Windows 11
3. Windows 11