Windows 10: Windows Defender Antivirus in Win10 is not working

My windows defender antivirus cannot perform scan... it is giving an error and then it will turn off automatically. The problem is I can not turn it back on... it is giving a message that IT Administrator permission is required...


I did a lot of trouble-shooting based on online solutions but to no avail... need professional help...




Aga

:)

 

Defender AntiVirus

There are 4 options under Defender. Two refer to AntiVirus; AntiVirus Network Inspection Service & AntiVirus Services. Under Startup Type these two are listed as manual and the Status column said Inspection Service is running. When I clicked on the Start
button in Properties, I got an immediate message: "Win.. Def.. Anti.. Serv.. on local comp.. started and then stopped. Some services stop automatically if they are not in use by other services or programs."

 

The best working antivirus program for windows 10 RTM


Most of them have not been certified to work with Win10. Until they do I would just use defender.
Check this out:
List of Anti-Viruses working in Windows 10 TP - Windows 10 Forums

 

Windows defender antivirus

Any other security program installed?



The behavior you are describing may
sometimes occur if another antivirus program is installed or there are remnants of a third party antivirus program still installed.



https://support.microsoft.com/en-us...b59cebc4f24/how-to-protect-your-windows-10-pc
Note the statement "If you want to use Windows Defender Antivirus, uninstall all of your other antivirus programs and Windows Defender Antivirus will automatically turn on. You may be asked to restart your device."



Go to Security and Maintenance, look in 'Security' and see what program is listed under Virus Protection. Windows Defender will not be enabled and functioning properly if there is a program other than Windows Defender listed.



See theAnswer
of quietman7 in this thread:windowsdefender wont turn on



If you cannot resolve an issue with WD, you may want to try the steps recommended in Problems
starting Windows Defender in Windows 8/8.1/10 to include (but not limited to) running SFC, scanning for malware and running the software removal tools for any security software
(AVG, Baidu, Kaspersky, McAfee, Norton, whatever) that may have previously been on the computer (to include a trial version of McAfee, Norton, etc that may have been on the computer when it was new) followed by a restart of the computer. See List of
anti-malware product removal tools





Alternatively - - -



You may prefer to install a third party antimalware program (which should disable Windows Defender).



There are a number of viable free and paid options available – take your pick…



Choosing an Anti-Virus Program



Is Windows Defender The Best For Windows
10? Good article but ignore the ads.



http://windows.microsoft.com/en-US/windows/antivirus-partners#AVtabs=win10



Regards…



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