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Questions tagged [windows-defender]

In Windows 8 and later versions of Windows, Windows Defender is a built in antivirus software product that replaces Microsoft Security Essentials. Before Windows 8, Windows Defender featured antispyware capabilities and was not offering antivirus protection.

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1answer
3k views

Antimalware Service Executable - Windows Defender Service - Large Network Usage

Antimalware Service / Windows Defender Service is using a large amount of network resources quite often on my machine. I am trying to first pinpoint WHY this is happening, before I move forward with ...
0
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1answer
17 views

uninstall windows 10 defender update

I need to uninstall the latest windows 10 defender update. However, these updates are not found in the 'uninstall an update'screen you can find under the update panel. When I go to 'security at a ...
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2answers
99 views

Is it possible to remove defender, antivirus and firewall from the latest Windows 10?

Is it possible to fully remove components like defender, antivirus and firewall from the latest Windows 10 (version 1809)? I mean delete them like it never exists? It's annoying me a lot, even after ...
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2answers
2k views

How to monitor Windows Defender real time protection?

I love how Microsoft made third party anti virus protection obsolete with Defender - it just works. Unfortunately for me as a developer this sometimes means it works a bit too well, and slows down ...
0
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0answers
23 views

Windows 10 Controlled folder access, when turned on does it prevent games from saving in documents?

Its a feature of windows 10 defender, but it doesn't explain itself well. When turned on, it takes you to a page where there is a list of folders its protecting like Documents and Pictures. They cant ...
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2answers
3k views

Error while opening the Windows Defender in Windows Server 2016

I installed a fresh server 2016 STD and joined to Domain. and logged in with domain administrator user. I got the error below when I opened Windows Defender from Settings. The error says it doesn't ...
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2answers
36 views

How to resolve RPC server is unavailable error related to non-functionality of Windows Defender (Windows 10)

I have for days unsuccessfully tried to troubleshoot the RPC server is unavailable error on my PC running Windows 10 education (64 bit) which started appearing a couple of days ago: I have tried an ...
7
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2answers
8k views

Remove Microsoft Bloatware ( OneDrive, Defender, Games, Ads, etc ) from Windows 10?

I simply want to get rid of all non critical Microsoft programs from Windows 10. They've made it incredibly difficult to permanently kill Defender and One Drive. Even after they are removed, you'll ...
0
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1answer
64 views

Windows Defender keeps taking action on nonexistent threats on nonexistent scans

I have a laptop (Dell Inspiron 3541) running Windows 10 v1803. Recently, I have been getting notifications from Windows Defender saying threats were found and removed on scnas that didn't happen. ...
1
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1answer
111 views

Cannot turn on Windows Defender virus protection

Why can't I turn on Windows Defender virus protection? Today I noticed that my Windows Defender virus protection was off. I've been through countless blog entries, articles, and forums but I can't ...
2
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1answer
154 views

Can't re-enable Windows Defender service even as administrator

I found that my Windows Defender settings were disabled, saying 'managed by organization', so I followed this guide to fix it (essentially getting rid of the HKEY_LOCAL_MACHINE\SOFTWARE\Policies\...
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3answers
2k views

Is it safe to remove Windows Defender? [duplicate]

I've recently been rather fed up with Windows, and have started removing useless system apps like Edge & IE, and I constantly see Windows Defender using 30+% of my CPU. I have another antivirus. ...
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2answers
3k views

How do you disable and remove the Windows Defender service permanently - kills battery life and performance running? [duplicate]

I am running the latest updates of Windows, and I want to remove all anti-virus based protection on my laptop for battery savings. I've tried going into PC Settings and Windows Defender, but it keeps ...
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3answers
29k views

How do I turn off Windows Defender from the command line?

I am searching for a command to temporarily turn off Windows Defender. Any suggestions?
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5answers
47k views

How to turn off Windows Defender permanently

Windows Defender keeps blocking a third-party program that I know isn't a threat. All my attempts to disable Windows Defender have failed. I've tried to: Go in the Windows Defender option and ...
1
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0answers
125 views

Windows 10: Turning off Windows Defender's real-time protection [duplicate]

Since the times of Windows 7 I'm used to turning off Windows Defender's real-time protection, as it causes too much overhead. As a pro-user, I know what I download and I haven't caught a virus ...
2
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2answers
2k views

How do I completely turn off Windows Defender in Windows 10?

As discussed here, Windows Defender seems to be the cause that make File Explorer become very slow to use. So I want to turn it off completely - using Real-time Protection off is just a temporary ...
2
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0answers
60 views

How to dismiss OneDrive notification in Windows Defender Security Centre?

For a few days now the icon for Windows Defender in the bottom right of my taskbar shows a yellow warning sign ⚠️ (which usually popped up when any problems were detected). When clicking on it, it ...
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0answers
40 views

How to properly diagnose Windows 10 pro firewall not functioning

Ok, macOS / Linux native here on Windows territory and a bit lost. I'm helping a family friend upgrade to Windows 10. He has a company laptop that he was allowed to keep after his retirement. It had ...
0
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1answer
1k views

If Windows Defender is “off” should MsMpEng even be running?

Note: system is Windows 7 Lately my computer's been grinding to a halt for a couple minutes at a time throughout the day for no apparent reason and with no obvious pattern. All I could see in the ...
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1answer
32 views

Can't disable Windows Defender for some reason [closed]

Allright, so here's the problem, i need to disable WD because it recognises a file as a Virus, while it's not, and it's annoying BUT... I can't, it's totaly stuck, i get stuff like "My IT ...
0
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1answer
528 views

How to stop Windows Defender deleting false positives during file copy?

I have a hard drive with old versions of downloaded programs, some coding I did myself and a few other things that I would like to back-up. The last time I did this, I ended up with Windows Defender ...
0
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0answers
34 views

Windows Defender definitions are outdated [duplicate]

Yesterday I have downloaded and run a program, which, I guess, have turned out to be a virus. There showed up a notification, that Windows Defender is turned off and I should turn if on. When I have ...
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0answers
237 views

Internet Explorer blocked by Defender Controlled Folder access - what is %desktopdirectory%\瘁毓翹?

I (accidently) launched Internet Explorer today and this triggered the following alert in Windows Defender (copy from the windows event log Microsoft-Windows-Windows Defender/Operational): C:\Program ...
7
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1answer
2k views

How to read the entire “Unauthorized changes blocked” message?

From time to time, Windows Defender (via Controlled Access Folder) blocks apps from accessing my files and raises a notification on the Windows notification bar. The notification looks like the ...
5
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5answers
11k views

Why is Windows Defender disabled?

OK, I have been doing nothing different than I have been since I have gotten Windows 7. Now all of the sudden Windows Defender is turned OFF and I cant turn it back on. It tells me that it is ...
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0answers
33 views

'unauthorized change blocked' for git commands or while developing with Unity

Every time I execute a git clone command, I got this warning from my Windows defender: unauthorized change blocked I'm using this command in PowerShell on a Windows 10 versie 1803 build 17134.165. ...
64
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7answers
224k views

Disabling Microsoft Antimalware service

I can't disable the Microsoft Antimalware service (MsMpSvc/MsMpEng.exe). I tried using services.msc, but the Startup Type drop-down is grayed out and I can't change it to Disabled nor stop the service....
2
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3answers
3k views

What format when excluding processes from Windows Defender?

I find the Windows Defender 'Excluded processes' window confusing. This is the screen I am referring to: I would expect just to enter the name of a process, e.g., devenv.exe, but the Browse button ...
2
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2answers
2k views

After removing AVG 2015 Windows Defender will not start

System: Windows Pro 8.1 After removal of AVG 2015, Windows Defender fails to start. When attempting to start Windows Defender via the UI It fails to start with error 0x8007139f When attempting to ...
0
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1answer
84 views

What traffic does Block(default) option block in Windows Firewall

I wanted to block all traffic, but from the device I remotely access the windows machine. I opened Advanced settings in Windows Defender and after a lot of trial and error with new rules, realised ...
0
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1answer
369 views

CPU usage way too high in Task Manager

One service is taking a LOT of CPU usage, and it doesn't cool down. This started when I enabled some Windows features (Application Guard, Guarded Host, etc), and turned on BitLocker on my main C: ...
4
votes
1answer
2k views

How can I get the full Windows 10 Notification messages (they are truncated)

Notifications in Windows 10 truncate reasonably important data. For instance, Defender is telling me a program is changing my folder, but it wont give the full message (path to exe): Now, this I can ...
0
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1answer
555 views

Annoying “Controlled folder access” popup after Windows 10 v1803 upgrade

I recently upgraded to Windows 10 v1803 (last night, as the update finally came out through Windows Update for my computer). However, I am now constantly getting this popup on my desktop. It's ...
4
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3answers
238 views

How to exclude scheduled task from Windows Defender?

I have scheduled task that should run every two hours, with the following command line action: Program: mshta Arguments: vbscript:Execute("CreateObject(""Wscript.Shell"").Run ""powershell -NoLogo -...
0
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1answer
97 views

How can I improve Windows Defender's increase of executable startup times?

I have a collection of scripts which call, a couple of thousands times, an external executable. This executable should have a fairly low run time, so this should not a big deal. But it is. In fact, ...
0
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0answers
15 views

Windows Defender, Bluetooth and Sticky Notes, all stopped working overnight. Plus blue screens

I've updated Windows. Every time blue screen appears I run the diagnosis that requires me to run the Windows Defender. And I can't access it through any method. Every time I click on any executable ...
5
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3answers
3k views

Does an Excluded Directory in Windows 10 Defender Also Include the Sub Directories?

I know how to exclude a file or folder (directory) from Windows Defender in Windows 10. What I'm not sure about is whether this exclusion applies to all sub directories within that directory? It ...
1
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0answers
141 views

How to permanently delete Windows Defender in Windows 10 Home? [duplicate]

I specifically insist on deleting it (perhaps, the whole C:\ProgramData\Microsoft\Windows Defender\Platform folder), because it eats a lot of system resources while being turned off through several ...
3
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1answer
1k views

Disable Defender but keep Windows Firewall active in Win10

In the latest Windows update (1803) it seems that the Windows Firewall is now part of Windows Defender. Windows Defender is questionable and MsMpEng.exe continuously eats resources - I disabled ...
1
vote
1answer
952 views

Script to add Regkey Exception to Windows Defender

If I want some kind of script to add an exclusion to Windows file defender, I can do something along these lines by saving the following text as a .bat file and running it: powershell -inputformat ...
3
votes
1answer
11k views

safe to delete windows defender scan and definition updates folders? Windows 7,8,8.1

It looks like WD keeps a history of all scans and keep older definition files. Is it ok to delete the content of these two folder and let WD rebuild their content. Anyway to disable WD to keep ...
0
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1answer
410 views

Windows Defender made all my documents “corrupt and unreadable” (0x80070570)

I read some stuff online about cryptocurrency mining and wanted to give it a go, so I downloaded a miner which I know to be trustworthy called XMR-Stak. I downloaded it from the official GitHub page, ...
1
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2answers
841 views

Windows Defender Service constantly at 20% CPU usage after re-installing Windows 10

After 3 years of using my laptop, I decided it’s time to format and reinstall Windows 10 from scratch. Everything went smooth, no issues. However I noticed in the task manager that the process “...
5
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2answers
1k views

Suppress “Windows Defender Antivirus did not find any threats…” notification on Windows 10

Every once in a while the little nofication balloon icon in my system tray is highlighted, which tells me something needs my attention. When I open the "Action Center", I just get a message saying ...
5
votes
5answers
6k views

Does Windows Defender update if Windows Update is set to manual?

It looks like the Windows Defender in Windows 8 won't upgrade the signatures automatically, if Windows Update is set to "Notify, but don't install the upgrades". Is my impression real? Is there is a ...
5
votes
1answer
3k views

How can I schedule scans in the Windows 8 Windows Defender?

In the previous Windows versions (XP, Vista and 7), Windows Defender included the option to schedule when Windows Defender scans your computer. However, Windows Defender on Windows 8 doesn't seem to ...
0
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1answer
430 views

System slow/unresponsive when Thunderbird is receiving emails with Windows Defender

When Thunderbird is receiving emails I see a very high CPU usage from Windows Defender, to a point that it hangs and become unresponsive. If I turn off real time protection, it go back to normal. Also,...
8
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1answer
8k views

How can you turn Core Isolation Memory Integrity back off again in Windows 10 build 17127 and later

In Windows 10 Insider Preview builds, in Windows Defender Security Center, after the Fall Creators Update, Windows Insiders will see a new feature Core Isolation. It's possible to turn the Memory ...
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1answer
592 views

Blocking outgoing traffic with Windows 10 Firewall for a specific Windows user

First of all, I'm aware of the following three questions and the corresponding answers, but none of them answer my problem: How to block/disable internet for one user in Windows 7 while keeping ...