method 1 does not work. Get error message 577, windows could not start windows defender service.
method2 .I don't have a windows defender icon on start screen.
Windows Defender in Windows 8.1 Will Not Turn On
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Anonymous
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
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Anonymous
2014-05-05T08:50:06+00:00 -
Anonymous
2014-04-30T10:21:05+00:00 I have the same problem and I got error messages saying something is installed and bc of that it cant turn on and I have no security software in my laptop
what do I do?
What *was* the prior security software?
You may need to use a cleanup tool to remove your prior security software. See this
Wiki article: List of anti-malware product removal tools
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Anonymous
2014-04-30T05:28:17+00:00 I have the same problem and I got error messages saying something is installed and bc of that it cant turn on and I have no security software in my laptop
what do I do?
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Anonymous
2014-04-29T21:53:35+00:00 it keeps graying out the areas as if I am not the administrator. When I dug deeper to check my permissions I'm ok for all but the special permissions. As I went further it says they have to be changed by a trusted installer and it did give me access to change that but it won't accept my name or administrator. What do I do now?
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Anonymous
2014-04-29T21:16:03+00:00 I have tried both of these and neither has worked