virus msgs from Windows Defender

These are likely either browser push notifications or threat notifications that need action in Windows Security.

1. In Windows Security, open Start > Settings > Update & Security > Windows Security > Virus & threat protection.
   • If a threat is listed, select Clean computer if shown.
   • If Show details appears, review the item and choose Remove or Quarantine.
   • Only choose Allow if the software and publisher are fully trusted.
2. If the same alerts keep returning, run an offline scan.
   • Go to Start > Settings > Update & Security > Windows Security > Virus & threat protection.
   • Under Current threats, select Scan options.
   • Select Windows Defender Offline scan, then Scan now.
   • Save work first, because the PC restarts before the scan.
3. If the pop-ups appear only when online or while browsing, remove browser notification permissions in Microsoft Edge.
   • Enter edge://settings/content/notifications in the Edge address bar.
   • In the Allow list, remove or block any site that is not recognized.
   • Suspicious entries are a common cause of fake McAfee, Norton, or Defender alerts.
   • Ask before sending can also be turned off to block all site notification prompts.
4. If Microsoft Defender keeps encountering scan or removal errors:
   • Run Windows Update to make sure the latest fixes and components are installed.
   • If update errors continue, try installing the latest protection updates manually.
5. If the offline scan causes a blue-screen stop error twice, contact Microsoft Support.

For the actions shown in Defender:

• Remove deletes the file.
• Quarantine moves it to a safe location so it cannot run.
• Allow lets it run and stops future alerts for that item.

Because the messages include McAfee and Norton alerts mixed with supposed Defender alerts, and they are blocking part of the screen, the most likely immediate fix is removing suspicious Edge notification permissions and then running Microsoft Defender Offline.

References:

• Endpoint Protection client frequently asked questions
• Troubleshoot problems with detecting and removing malware
• Run and review the results of a Microsoft Defender Offline scan
• Antivirus and antimalware software: FAQ
• How do I remove a persistent fake-virus alert popup? - Microsoft Q&A