KB5077181 Install error - 0x800f0983

Question

I'm not able to install the update: 2026-02 Security Update (KB5077181) (26100.7840)

Install error - 0x800f0983

My Windows 11 version: 24H2 (OS Build 26100.4351)

Answer 1

Thank you for sharing your current build.

You have the June 11, 2025 build, which is outdated.

Your device may no longer be receiving feature updates properly, which can cause this issue. In that case, you’ll need to do an in-place upgrade to move to the latest version.

To perform an in-place upgrade:

• Go to: https://www.microsoft.com/software-download/windows11
• Under Windows 11 Installation Assistant, click "Download now".
• Open the downloaded file and follow the on-screen instructions

This process keeps your personal files and apps while updating Windows to the latest version.

This will download and restart your PC several times. This may take some time, so please be patient and do not interrupt the process.

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I really hope this information is helpful! Let me know if you have any further questions or concerns.

Regards,

John J.D.

Answer 2

Hi, I'm John! I will help you with this.

To help narrow down the issue:

1. May I know what other troubleshooting steps have you already taken? This will help me avoid recommending them again.
2. Can I ask if you’ve already checked whether you have any third-party antivirus software running?

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If you haven't tried anything yet please start by:

First, make sure there's no third-party antivirus software active that might be interfering with the update process:

• Open the Windows Security app.
• Click the "Settings" (gear icon) in the lower left.
• Under Security Providers, click "Manage Providers".
• Verify if Microsoft Defender Antivirus is the active antivirus and Windows Firewall is the firewall.
• If not, please uninstall the third-party antivirus, restart your PC, and check again at Settings > Windows Update.

If issue persists, run again the Windows Update Troubleshooter from Get Help app:

• Open Settings > System > Troubleshoot > Other troubleshooters.
• Find Windows Update and click Run. This will open the Get Help app.
• Select "I can't download, install, or uninstall an update" and click "Yes".
• This will automatically identify and address any errors and restart the update process. This step is purely automatic.
• Please continue to follow the prompt if the issue persists.

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If the issue persists, please provide more details by answering my questions.

Click "Add comment" below to let me know.

Regards,

John J.D.