Windows Defender turning off

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chrisauk

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Jul 21, 2004
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Hi all, wonder if you can help me.

Running Windows 10 with all latest updates.

Recently I've been getting the notification that my Windows defender is turned off.
Going into the security centre I try to turn it in, but nothing happens.

I've checked the services and windows defender is running.

Thought it may be to do with my Avira firewall, so turned that off, but still cannot get
defender to turn on.

Interestingly, when I reboot my PC defender IS on.

It gets switched off around 5 mins or so of using the pc, then it cannot be switched on again.

Any ideas what is happening, or how to test stuff?
 

blues_harp28

Trusted Advisor
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If you turn off Avira firewall - then reboot, can you use Windows Defender?
Avira firewall may be stopping Defender from turning on as using two firewalls, will cause a conflict.
 

chrisauk

Thread Starter
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Jul 21, 2004
Messages
34
Hi, apparently Avira and Defender work ok side by side. That's been the case on my PC for a year or so at least.

But, yes, I did try that. Boot the PC. Defender is on. ... turn off Avira Firewall. Defender stays on. 5 / 10 mins later, defender goes off, and cannot be turned back on.
 

Cookiegal

Karen
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Malware Specialist Coordinator
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Which Avira product are you running?

As far as I know Avira doesn't have a standalone firewall.
 
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It gets switched off around 5 mins or so of using the pc, then it cannot be switched on again.
That sounds like "sleep" problem.

1. Press Windows key
2. type: cmd.exe
3. run command prompt as Administrator
4. type or copy/paste bellow command and hit enter
powercfg -energy
5. Note where the file gets saved, locate html file, zip it up and share here.
 

Cookiegal

Karen
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Yes but it's not a standalone firewall. It's an antivirus with firewall and will likely turn off Windows Defender.
 

chrisauk

Thread Starter
Joined
Jul 21, 2004
Messages
34
That sounds like "sleep" problem.

1. Press Windows key
2. type: cmd.exe
3. run command prompt as Administrator
4. type or copy/paste bellow command and hit enter
powercfg -energy
5. Note where the file gets saved, locate html file, zip it up and share here.
here goes ...
 

Attachments

Joined
Mar 2, 2019
Messages
940
There is no sleep problem, these errors and warnings from report can be fixed but will likely not resolve Windows Defender problem.

I agree with others, you have Avira antivirus (also according to report), and therefore Windows defender doesn't need to run, why it does on startup I don't know.

Decide which one you want to use; see bellow link how to remove Avira and reboot system:
https://support.avira.com/hc/en-us/articles/360003162153-How-do-I-uninstall-my-Avira-product-
 

Cookiegal

Karen
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With Windows 10 you're best to just use the Windows Defender (or Windows Security as I think it's now called) to avoid any possible conflicts. At least, that's what most experts say.
 
Joined
Apr 1, 2017
Messages
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When installing another antivirus in windows 10,windows defender automatically disables itself to avoid conflicts.
Personally i would uninstall avira using revo uninstaller.Be sure all remnants are completely gone.
Have you had any previous antivirus installed?
Remnants from old installations of previous antivirus can also cause this issue.
It cant hurt to uninstall avira and reboot to see if the issue persist.If it does,then you can atleast rule it out.
I agree with cookiegal.Windows defender is sufficient for windows 10. Installing another antivirus along side it is bound to cause issues.
 

DR.M

Malware Trainee
Joined
Sep 4, 2019
Messages
595
Usually Avira has a delayed start. Perhaps that is why WD starts and then, when Avira starts running (the umbrella finally opens), is being disabled. Uninstalling Avira and then check if the problem insists is a step to troubleshoot it. In any case, using two antivirus may cause you a lot of issues. I agree that WD is the best solution for Windows 10 right now, but this is your decision.
 

chrisauk

Thread Starter
Joined
Jul 21, 2004
Messages
34
Hi, ok. I've Deleted Avira, and all remnants.

Never had trouble before and have no other virus checkers installed.

Anyway, it's just me and Defender now. .... Started good, but after around 5 minutes it again, stopped working. I'm unable to turn it on. I've gone into services and see that it is set to manually start. I try to change this to automatic and it says I "don't have permissions".

Turning into a right PITA.
 
Joined
Mar 2, 2019
Messages
940
I've gone into services and see that it is set to manually start.
The only services that must be "Automatic" are called:
"Microsoft Defender Antivirus"
"Windows Defender Firewall"

If these are not automatic here is how to set to auto:
1. Press Windows key
2. type cmd.exe
3. Open command prompt as Administrator
4. copy/paste bellow code, right click into console to paste and press enter to manage Firewall service
sc config "mpssvc" start= auto
5. copy/paste bellow code, right click into console to paste and press enter to manage Defender service
sc config "WinDefend" start= auto
 
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