Windows 8 Defender won't update,80070666 error [Archive] - Windows 8 Forum

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smith

04-12-2012, 10:36 PM

I'm running Windows 8 CP, but Windows Defender won't update its definitions and therefore nags about being out of date.

After selecting "Windows Defender More" Defender wouldn't start.

If I do Windows Update, I get 80070666 error.

Medico

04-13-2012, 01:59 AM

MS has a couple possible fixes for this error (http://answers.microsoft.com/en-us/windows/forum/windows_7-windows_update/windowsupdate-80070666-error-in-microsoft-update/8bac407d-9026-41c3-9c5d-858b36407570?tab=MoreHelp).