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Windows Defender turned off after Windows 10 upgrade
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Do you have any other Anti-Virus product installed? If so, you need to uninstall it.
List of anti-malware product removal tools - Microsoft Community
And try:
How to Turn On or Off Windows Defender in Windows 10
Cheers,
J
Later edited to include the title (for http://www.tenforums.com/tutorials/5918-windows-defender-turn-off-windows-10-a.html)
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Was there a third-party security product installed on Win8.1 before the upgrade to Windows 10?
See: Microsoft Windows 10 (Important notes section) Specifications page.
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PS:
Also, go through everything here: Problems starting Windows Defender in Windows 8/8.1
Should apply to Windows 10, too...
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Same problem here. I uninstalled ioBit malware program and now when I try to turn Defender on, all the switches are greyed out and if I select "turn on Defender" I just get a message telling me it is turned off. ??
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7 people found this reply helpful
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I was in a long discussion about this prior to the 29th. I wanted to know how to turn WinDef on and the moderators were seeking to know how I turned it off.
I did two installs on my laptop and on a new aio. With the all-in-one I removed all possible anti-viruses and maleware fighters. WinDef was on by default and continues sturdily onward. From the earlier discussions and readings, I did find and do believe that MS has included several entirely transparent new traps and WinDef is not functioning by itself. I am giving MS a chance to prove that.
I took off all anti-virus and malware fighters on the laptop, except for one - SecureAPlus, a small program the trips up things like ransomware, before the up-grade. Yup, happened again. WinDef is not working and is greyed out on the buttons.
Did anyone find a real cure? I left the listing with the suggestion from Steve to run a stand-alone anti-virus program in SafeMode. Some people have found that an infection is to blame. And, as often quoted, MS intentionally defaults WinDef to Off when it finds another big anti-virus program. I guess that a little one counts, too.
But, assuming that is the case, I am still searching for how to turn WinDef back on.
Carol13
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Guess what? In another listing I found a seemingly productive way to proceed. It was from another question and answered by Jsssssssssssss. Try:
http://www.tenforums.com/tutorials/5918-windows-defender-turn-off-windows-10-a.html
I don't have time now to fiddle with it, but it is definitely prioritized. The title should be how to turn WinDef off and on. Good Luck!
Carol13
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Question Info
Last updated December 30, 2022 Views 3,226 Applies to: