2026-02 Security Update (KB5077181) (26100.7840) is not installing

Question

2026-02 Security Update (KB5077181) (26100.7840) is not installing and it's been months sinse the problem is coming

Answer 1

Dear @sai gangurde,

Thank you for posting your question in the Microsoft Q&A forum.

We apologize for any inconvenience you may encounter when using our services/ products. Based on your description, kindly try these following steps:

Using "Windows Update" to support the issue

• Open Settings > System > Recovery.
• Under "Fix problems using Windows Update" > Reinstall now.
• Keep the PC connected to power + internet during the process.
• Restart when it completes (or let it auto‑restart if you choose that option). Fix issues by reinstalling the current version of Windows - Microsoft Support

Manually update from Microsoft Update Catalog

• Go to the Microsoft Update Catalog and search KB5077181.
• Download the package that matches your device:
• Windows 11 24H2 x64 (26100.7840) or arm64 (26100.7840)
• Run the downloaded .msu and follow the prompts, then restart.
• Verify it is installed in Windows Update history.

I sincerely hope you understand that the initial steps I suggested may not have completely fixed the issue, as there may still be underlying causes that have not yet been identified. I am here to work closely with you, troubleshoot effectively, and explore every possible solution to ensure the best possible outcome.

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