Windows 11 Pro offers a robust suite of security features under the umbrella of Windows Security, which operates continuously to safeguard your PC. While the alerts generated by this system may initially seem alarming, understanding how to effectively respond to them is essential for maintaining the integrity of your data and device. Below are insights into some common security alerts you may encounter.
1. How to troubleshoot “Turn on virus protection” or “Real-time protection is off” alerts
When you see an alert in the bottom-right corner of your desktop indicating that real-time protection has been disabled, it typically occurs after the installation or removal of a third-party antivirus program. To restore protection, follow these steps:
- Open Windows Security.
- Select Turn on in the Virus & threat protection section.
- Confirm by clicking Yes in the subsequent window.
Be aware that re-enabling Defender’s real-time protection may conflict with your third-party antivirus, so ensure that it provides adequate protection before proceeding.
2. How to troubleshoot “Threat found” or “Threat found – action needed” alerts
These alerts signal that Windows Defender has detected a potential threat. While some threats may be harmless, it is crucial to address these notifications promptly. To manage these alerts:
- Open Windows Security.
- Navigate to Virus & threat protection.
- Click on Protection history.
- Select the Threat blocked option from the list.
- Access the Actions dropdown menu.
You will be presented with options to Quarantine or Allow on device. Unless you are certain the file is safe, opt for quarantine. In some instances, Defender may automatically quarantine or block the file, limiting your options to allowing it. If you later wish to remove an allowed threat, follow these steps:
- Open Windows Security.
- Select Virus & threat protection.
- Click on Allowed threats.
- Choose Remove.
3. How to troubleshoot “Threat quarantined” or “Threat blocked” alerts
A Threat quarantined alert indicates that Defender has isolated a file for your review. You can either remove or allow the file as described previously. A Threat blocked alert means that Defender has successfully removed the file, requiring no further action on your part. However, it is wise to investigate how the threat infiltrated your system to prevent future occurrences.
5. How to troubleshoot SmartScreen alerts
The Defender SmartScreen feature is designed to protect against malicious websites and downloads. When SmartScreen identifies a potential threat, it displays a bright red warning page. If you believe the site is safe, you can click on the More information dropdown to report it as safe or proceed at your own risk. Downloads blocked by SmartScreen will appear in Edge’s Downloads menu, where you can choose to delete them or take other actions via the three-dot menu next to the blocked file.
6. How to troubleshoot “This app has been blocked” alerts
Windows 11’s Smart App Control feature prevents the installation of untrusted or potentially harmful applications. Unlike SmartScreen, this tool does not allow for exceptions on a per-app basis. If you encounter an alert stating “This app has been blocked“, it is advisable to heed this warning. Disabling Smart App Control should only be considered if you are completely confident in the application’s safety. You can find Smart App Control settings under Windows Security > App & browser control > Smart App Control settings.
