Where Are Windows Defender Updates Stored?
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Windows Defender Antivirus drivers %Windir%System32drivers %Windir%System32driverswd

Where does Windows Defender get updates from?

Microsoft Defender Antivirus Security intelligence updates are delivered through Windows Update, and starting Monday October 21, 2019 security intelligence updates will be SHA-2 signed exclusively.

How do I roll back Windows Defender update?

First, if you can get into Windows, follow these steps to roll back an update:

  1. Press Win+I to open the Settings app.
  2. Choose Update and Security.
  3. Click the Update History link.
  4. Click the Uninstall Updates link. …
  5. Choose the update you want to undo. …
  6. Click the Uninstall button that appears on the toolbar.
James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.

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