Windows Defender keeps a history of all past detections called Protection History.
Protection History screen shows all detections like Viruses, Malware, Potentially Unwanted Apps, etc.
The history is stored for approximately 30 days. After that, it's cleared automatically.
Before clearing the Protection History, it's important to scan your PC for viruses and malware with a reliable antimalware scanner.
You can clear Windows Security Protection History through manual deletion, via Event Viewer, using the Local Group Policy editor or PowerShell utility.
If the Protection History of Windows Security app already shows a blank screen, it’s a sign of a few problems.
In such a case, you need to try the troubleshooting methods shared in this guide.
Clearing the Microsoft Defender or Windows Security Protection History log on Windows 11 can help you free up space and make the Defender app run more smoothly.
Always prioritize scanning for malware before proceeding to clear this history of detections.
If you need more help removing the Defender Protection history log, follow the guide or reach out to TechViral.