Several factors, including interference from Third-Party Antivirus software, a Corrupted Cache, or Damaged System Files, could cause this error. This guide will provide several methods to help you resolve this issue.

1. Disable Third-Party Antivirus

A Third-Party Antivirus program might conflict with the normal update process of Microsoft Defender. Disabling such programs can often clear this error. Disable your antivirus by following these steps.

2. Using Windows Troubleshooter

Windows Troubleshooter is a built-in utility that can identify and attempt to resolve problems with the Windows OS. It can be helpful in resolving update issues:

3. Reset Update Database Cache

The Software Distribution folder, otherwise known as the Windows Update Database Cache, stores files necessary for installing updates. If the cache is corrupted, it can cause updates to fail.

4. Use Microsoft Update Assistant

Microsoft Update Assistant is a tool that facilitates the updating of your operating system to the latest version, including the definition updates.

5. Repairing System Files

Corrupted or damaged system files could be the culprits for the update error. Deployment Image Servicing and Management (DISM) and System File Checker (SFC) are command-line tools that can be used to repair corrupted files.

6. Manual Update

If automatic updates are not functioning, consider manually updating the Security Intelligence to the most recent version.

6.1 Command Prompt Method

6.2 Download Update Package

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