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1 Click Tools at the top of the Windows Defender Window. 2  Click Options in the Settings section of Windows Defender. 3  Click Default actions.  Set the default actions (recommended action based on definitions, Remove, or Quarantine) for each level of alert and then click Save.
Enabling and Disabling Windows Defender. To toggle Windows Defender on and off press Windows Key + q from the Desktop or head over to the Start Screen and start typing Windows Defender. Defender will quickly pop into the search results. Give it a click and the Defender application will steal the stage. If Defender is disabled youâll immediately know because of the frightening blood red color theme that decorates the main window. Click the obnoxiously big Turn on button to activate Defender.