Windows Security, a built-in antivirus program on Windows 10 and Windows 11, helps protect PCs from threats and malicious files.Some Windows 11 users are experiencing issues with the Protection History option in the Windows Security app.Protection History displays actions taken by the security software to safeguard the PC, such as scan results and blocked threats.To fix the Missing Protection History issue, users can try restarting their Windows 11 PC.Disabling any third-party security program being used can also resolve the empty Protection History problem.Clearing existing detection history files and manually deleting scan history are recommended steps to address the issue.Restarting real-time protection and cloud-delivered protection after these actions can help the Protection History feature work correctly.Repairing or resetting the Windows Security app may also fix the Protection History display problem.Running SFC and DISM commands can help resolve system file corruption that causes the blank Protection History issue.Re-registering the internal components of Windows Security through PowerShell can also assist in resolving the problem.