This package includes monthly updates and fixes to the Microsoft Defender antimalware platform and engine that is used by Microsoft Defender Antivirus in Windows 11.

Sep 28, 2025 · Microsoft releases updates for Windows Defender via Windows Update. You can go to Windows Update and click Check for updates to see if there is an available Windows …

Oct 3, 2025 · With default installation settings, Microsoft Defender Antivirus is turned on and automatically updated in the background, unless you have disabled it or installed a third-party …

Jul 15, 2025 · Microsoft Defender updates are automatically downloaded and installed through Windows Update. Open the update installation history in the Windows Control Panel ( ms …

Feb 26, 2024 · We show you different methods for how to update Microsoft Defender definitions on Windows 11. It can be done automatically and manually. Microsoft Defender, previously …

Nov 10, 2023 · It’s imperative to keep Microsoft Defender up to date even when Windows Update isn’t working. Here are several methods to manually update Defender. Microsoft Defender is …

Aug 18, 2025 · Open Windows Security → Virus & threat protection → Protection updates → Check for updates. This triggers Defender to fetch the latest security intelligence from the …

On Windows 10 and Windows 11: Open Settings (press the Windows key + I). Find and click Update & security. If you use Windows 11, click Privacy & security. Click Windows Security. …

Jan 10, 2025 · Windows Defender, now known as Microsoft Defender Antivirus, is an essential component of the Windows operating system that helps protect your computer from viruses, …

Aug 16, 2025 · Below, we have shared a few best ways to manually update the Windows Security application on Windows 11. 1. Check if Windows Security is Updated. Before manually …