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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.
2. To Turn On Windows Defender NOTE: This is the default setting. A) Click/tap on the Download button below to download the file below, and go to step 4 below. Turn_On_Windows_Defender.reg 3. To Turn Off Windows Defender A) Click/tap on the Download button below to download the file below, and go to step 4 below.Turn_Off_Windows_Defender.reg 4. Save the .reg file to your desktop. 5. Double click/tap on the downloaded .reg file to merge it. 6.indows will automatically turn real-time protection back on if it's off for a while. This tutorial will show you how to completely turn on or off Windows Defender for all users in Windows 10. You must be signed in as an administrator to be able to turn on or off Windows Defender.