Hi Claus,
Thank you for sharing the situation in detail.
Based on the screenshot you provided, the April monthly update appears stuck at 20% during installation. To help troubleshoot, could you clarify:
- Which tool are you using to manage Windows Update?
- What is the current update status on your machine? (Is it still on last year’s update?) You can check by running:
dism /online /get-packages /format:table
If the 2025 SSU (Servicing Stack Update) is already installed, you can proceed with a manual installation using DISM.
You mentioned using .mum files for add-package
, but I’m unclear on the exact steps you followed. Could you share a screenshot of the process?
For clarity, the correct method for manual installation via DISM uses .cab files (not .mum). Here’s the recommended approach:
Steps to Manually Install the Update:
Download the April patch from the Microsoft Update Catalog.
Copy the .msu file to C:\temp
Create a new folder named CAB inside C:\temp
Open Command Prompt as Administrator and navigate to C:\temp
Extract the .msu to .cab using this command (replace update.msu with your actual filename):
expand -F:* update.msu C:\temp\cab
Install the update using DISM (replace filename.cab with the extracted file’s name):
DISM /Online /Add-Package /PackagePath:"C:\temp\cab\filename.cab"
Reboot your machine and verify if the patch installed successfully.
Let me know if you encounter any issues or need further assistance!