Choices on the Options page—specifically, the first option on the Automatic Scanning and Real-Time Protection panels—let you turn off automatic scanning and real-time protection. Even if you turn off both options, however, the Windows Defender service continues to run and the program remains available for manual scans . If you want to disable Windows Defender altogether, open Windows Defender, click Tools, click Options, and then click Administrator. Clear the Use This Program check box to disable Windows Defender.
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