does windows 10 automatically download defender updates

Select the Virus & threat protection tile (or the shield icon on the left menu bar). Open the Windows Security app by clicking the shield icon in the task bar or searching the start menu for Windows Security. Review virus and threat protection settings in the Windows Security app

It is not the Microsoft 365 Defender web portal that is used to review and manage Microsoft Defender for Endpoint. The Windows Security app is a client interface on Windows 10, version 1703 and later.

See the Windows Security article for more information on other Windows security features that can be monitored in the app. This will significantly lower the protection of your device and could lead to malware infection. It might also prevent Microsoft Defender Antivirus from enabling itself if you have an old or outdated third-party antivirus, or if you uninstall any third-party antivirus products you might have previously installed. If you do disable the Windows Security app service, or configure its associated Group Policy settings to prevent it from starting or running, the Windows Security app might display stale or inaccurate information about any antivirus or firewall products you have installed on the device. These are disabled automatically when a third-party antivirus or firewall product is installed and kept up to date. Disabling the Windows Security app service does not disable Microsoft Defender Antivirus or Windows Defender Firewall.

Does windows 10 automatically download defender updates