Windows Defender in Windows 8.1 Will Not Turn On

Anonymous
2013-11-24T01:31:23+00:00

I recently updated Windows 8 to Windows 8.1.  Windows Defender had been on in Windows 8 and even after the update to 8.1.  I turned it off momentarily but have been unable to turn it back on.  To my knowledge, I have no other anti-virus programs running.  How can I turn it back on?

Windows for home | Previous Windows versions | Security and privacy

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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  1. Anonymous
    2015-03-03T21:20:57+00:00

    See...

        • HOW TO begin your own, new thread about your computer & problem

           http://answers.microsoft.com/en-us/page/faq#faqAskQuestion1

        • Suggestions for asking a question in help forums

           http://support.microsoft.com/kb/555375

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  2. Anonymous
    2015-03-03T22:03:31+00:00

    Sorry, I have been commenting on this thread and as I am following it I am allowed to comment.

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  3. Anonymous
    2015-03-03T23:19:36+00:00

    I wasn't replying to a post of yours.

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  4. Anonymous
    2015-03-27T23:36:09+00:00

    The windows defender on my PC could not be turned on. It was giving error 577. I uninstalled antivirus on my PC and presto I could turn on the defender. thus the other ntivirus was interfering with the working of the defender.

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