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Why Does Windows 11 Update KB5051987 Fail with Error 0x800F0838?
You try to install the February 2025 cumulative update (KB5051987) on Windows 11 version 24H2. It doesn’t work. Instead, you get a frustrating error code: 0x800F0838. What’s going on?
This error usually points to a missing Servicing Stack Update (SSU) or unmet dependencies in your system. Without these, Windows can’t complete the installation. Let’s break it down and fix it.
What Causes Error Code 0x800F0838?
Here’s what’s happening under the hood:
- Missing Files or Folders: Windows Update can’t find what it needs during installation.
- Dependency Issues: The update relies on a previous “Checkpoint Cumulative Update” (KB5043080 from September 2024). Without it, the process stalls.
- Manual Installation Problems: If you’re using .MSU files, the required updates might not be in the same directory.
How to Fix It
Follow these steps to resolve the issue:
- Ensure that KB5043080 (released September 10, 2024) is installed first.
- If not, download it from the Microsoft Update Catalog.
- Get the .MSU files for both updates:
- Create a folder (e.g., C:\Updates) and move both .MSU files there.
- Open PowerShell as an administrator and run this command:
Add-WindowsPackage -Online -PackagePath "C:\Updates\windows11.0-kb5043080-x64_953449672073f8fb99badb4cc6d5d7849b9c83e8.msu" Add-WindowsPackage -Online -PackagePath "C:\Updates\windows11.0-kb5051987-x64_199ed7806a74fe78e3b0ef4f2073760000f71972.msu"
- After installation, reboot your computer to finalize changes.
Quick Tips to Avoid Future Errors
- Always install updates in order of release dates.
- Keep your Servicing Stack Updates (SSUs) up to date—they’re critical for smooth installations.
- Use PowerShell commands carefully; they’re powerful but require precision.
This error can feel like hitting a wall, but it’s manageable with the right steps. By addressing dependencies and using manual installation methods, you can get your system updated without further headaches.