If the Virus & threat protection section is missing or Windows Security shows that there are no security providers, this usually means that Microsoft Defender Antivirus is not being detected correctly, another antivirus is registered, or the Windows Security app/services have an issue.
Could you please check the following?
- Press Windows + R, type: services.msc
- Check if these services are running: Security Center Microsoft Defender Antivirus Service Windows Security Service
Please let me know:
- Are you using any third-party antivirus (Norton, McAfee, Avast, Kaspersky, etc.)?
- Did this start after a Windows update, installing a program, or removing an antivirus?