If you can’t turn on or off Real-time protection in Windows Defender on Windows 11 ... when you have installed and enabled a third-party antivirus. Some third-party antivirus allow users ...

Disabling Windows Defender may be preferable for users relying on third-party antivirus software. As Windows Defender is deeply integrated into the OS, disabling it involves editing the registry ...

Windows Defender is a high-performing antivirus program that outperforms industry standards. AV-Test's Windows antivirus list reports Windows Defender's strong performance in protection.

Nevertheless, it’s advisable to run an AV scan using any reputable on-demand standalone antivirus software – as well as run a Windows Defender Boot-Time scan as additional measures.