Windows 10: After Update to 1809 on NEW SSD, "Windows Defender: Your Virus & threat protection is...

I do some MS and Apple IT work for small business and home users. I replaced the HDD in a Dell Latitude, late model, with a new SSD, and installed Windows 10 fresh/clean using SDHC written using the Microsoft Media Builder. It installed version 1803. The next day I upgraded that to Version 1809 [December 19 2018]. The only software installed on the system were the driver packages that Windows 10 did not pickup, and the browsers: Firefox, Chrome. nothing else. I did this under a Local User Account with Administrative privileges for the intended user. I did not enable the builtin Administrator account.


Two days later I enabled the built-in Administrator Account because there were some folders under the Local Account to which I got "access denied" that should not have been. I ran, under the enabled Administrator Account sfc /scannow, it completed with errors, could not repair and left a cbs log. I noticed there was a Notification that Defender was not operating. When I went to Settings for Defender I was denied [still logged in as built-in Administrator ] message: "Windows Defender: Your Virus & threat protection is managed by your IT organization"

I was not able to bypass that block.

Disabled the Administrator account, went back to the one/only user account and ran sfc /scannow again, same result.

Are these permissions problems normal for V 1809 at this point? Should I redo the whole system with Version 1803 and stay there until beyond 1809?

:)

 

virus and threat protection

Virus and threat protection has stopped and will not restart, Windows 10 ver 1709, antimalware client ver 4.12.16299.15 . SuperAntiSpyware installed.

I have tried most of the suggestions from the support pages, all have been ineffective. Any suggestions

Moved from: Virus and Malware / Windows Defender / Updating Virus and Spyware Definitions / Windows 10

 

Cannot turn on Windows Defender virus protection

I had the same sort of symptoms. In the Windows Security Center, under Virus and threat protection, it said "Your virus & threat protection is managed by your organization."





I note you mentioned the Registry Keys under HKLM/SOFTWARE/Microsoft/Windows Defender. Nice spotting, but it seems like there is another key that is causing the problem for some users.

Steps to a solution:

1. Press the Windows key and type "regedit"
   
2. On the regedit icon that appears, right-click and select Run as Administrator.
   
3. Navigate to the folder located at HKLM\SOFTWARE\Policies\Microsoft\Windows Defender (You can paste this into the address box at the top of the window, or navigate manually using the side directory structure)
   
4. In this folder, there are probably two keys. Right-click and Delete the DisableAntiSpyware key.
   
5. Exit regedit, and return to the Windows Defender settings screen (refresh it if necessary). Windows Defender should have the scan options available and working.
   

Solution adapted from here, with a much more detailed solution here.

 

windows defender virus and threat protection

i am not able to turn on the virus and threat protection function of windows defender in my windows 10 laptop....

while i was trying to download one key generator , an additional a software named KOMETA browser also installed without my knowledge.......

and it changed the startup menu , start icon , and a small gadget deck in my desktop. and i tried a lot to uninstall the kometa browser , atlast i found the solution in malware tips.com . by looking down the procedures, i downloaded Adwcleaner to remove
adwares , at that time windows defender virus and threat protection went off.... i also downloaded Malwarebytes to remove the browser ads... and i uninstalled both software . and when tried to scan my laptop with windows defender , it asked me to restart
virus and threat protection , but when i tried to restart it , showed a dialogue box reading "Unexpected error. Sorry, we ran into a problem. Please try again". and now i am not able to scan with windows defender....