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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Need Examples of “Domains” for Windows Defender Firewall (home user)

In order to better understand the Windows Defender firewall, I am trying to locate examples of Domain controllers (or Domains otherwise). The only one I've located so far is an Azure Active Directory ...
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45 views

win10 Windows Security, how to disable “Real-time protection” permanently? [duplicate]

every time i turn off Real-time protection, its off for a few days (maybe 3 days?) then it automatically turns itself on again, how do i stop it?
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How can I give myself permissions for Windows 10 Defender Registry keys? [duplicate]

I want to apply following registry edit. I know what I'm doing and I physically own this machine, so I'm questioning Windows' effort to make this as hard as possible for us. Windows Registry Editor ...
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55 views

How can I change Win 10 protected registry entries?

I'm trying to disable Windows Real-time protection on Win 10 Home Edition, following this tutorial, I reached this point: where I get the Error: error writing the value's new contents, I also tried ...
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91 views

How do I remove/disabled MsMpEng.exe? [duplicate]

My system regularly crashes with the following error in the error log Windows successfully diagnosed a low virtual memory condition. The following programs consumed the most virtual memory: MsMpEng....
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322 views

Disable Windows Defender in Windows 10 20H2

I can't safely eject/remove my USB hard drive, because Windows Defender is accessing it all the time: Die Anwendung \Device\HarddiskVolume6\ProgramData\Microsoft\Windows Defender\Platform\4.18.2103.3-...
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55 views

How to use Fiddler with Windows Defender Application Guard on Edge browser

I'm on latest Windows 10 Enterprise edition (personal PC). I have latest Fiddler and Edge browser installed (stable and canary channels). Fiddler's root certificate is installed and trusted, it can ...
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27 views

How to exclude specific shadow copy files or folders from Windows Defender?

I have some utilities purposefully installed on my computer that Windows Defender detects as malware/hacking tools and wants to remove. I've successfully added them to the exclusion whitelist via ...
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58 views

How to keep files from being deleted or quarantined by Windows Defender?

I got an external hard disk with lots of stuff I use in it. I connect it to different computers, sometimes not mine, so I use "NTFS drive protection" to keep my files from being deleted ...
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457 views

How to check Windows Defender status via the command line?

How can I check and make sure that all Windows Defender shields and protection are on/active and that everything has a green tick: via the Windows 10's command prompt? Edit #1: Per @JG7's and @...
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81 views

Why Microsoft Defender Offline scan won’t work?

When i try to do scan, my computer shows screen with Windows Defender Offline scan loading and then just after minute restarts and never finishes scan. Why it does that, can i somehow fix it?
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319 views

Windows Defender quarnatined gfdriver.sys, what is it?

Windows Defender found this file in my system32\drivers directory: gfdriver.sys. Anyone have any idea what this file may be? I'm normally very careful where I browse and what I download, so I'm ...
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35 views

Defender needs updated & shows me a strange message. What does this mean?

What is the meaning of this? I get notified that Defender needs updated & when I try to update it this pops up. OS is Windows 8.0- Clicking help is worthless, same for searching the error number. ...
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56 views

Windows Defender command line scan fails

When I run MpCmdRun.exe -Scan -ScanType 1 (or 2) it echos "Scan starting..." and INSTANTLY throws me back to the command prompt. This works fine on other machines, just not the one in ...
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81 views

Can't disable Windows Defender by using group policies [duplicate]

I have recently installed Win 10 Pro. No matter how many times i try to disable Defender Antivirus with Group Policy Editor (Computer Configuration > Administrative Templates > Windows ...
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How to allow only USB cable transfer and block internet on Windows Firewall?

I've bought a KM (keyboard-mouse) link cable. When you connect 2 PCs with this cable, you can use either PCs with a single mouse/keyboard. Also you can make data transfer by just drag&drop. This ...
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550 views

Is there no Microsoft-aproved way to disable Windows Defender in Windows 20H2?

In short, I do not want "MsMpEng.exe" to be running in the background. I have tried the Group Policy method, but when I rebooted, that setting was set back to "Not configured". I ...
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100 views

No Windows Security GUI on Server 2019

I just noticed today that none of my Server 2019 boxes have a Windows Defender GUI or anything down by the clock to even suggest it is running. It is installed and running on all of them but no GUI. ...
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68 views

winrmsrv Virus, Windows Security all gone [duplicate]

I have been hit with a Virus that disables Windows Security by removing all its components (Windows 10). Startup Repair fails to run and I don't have a system restore that dates back before this (or ...
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How to Know if Windows Defender is currently scanning

So my work laptop has been running hot all day with the Windows Defender service consuming a CPU core the whole time. A few restarts and a full shutdown haven't stopped it. Only thing I can think of ...
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203 views

-Windows 10 Home Signin takes a really long time (like around 10 minutes)

Here are the details about my computer: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz Installed RAM 16.0GB 64-Bit Operation System, x64-based processor Windows 10 Home Windows Feature Experience Pack ...
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37 views

Enable Windows Defender Firewall rule only on specific network

A network I often connect to logs me out from iTunes. I've set up a rule in Windows Defender Firewall to block iTunes from connecting to the internet, does anyone know of a way to only have that rule ...
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914 views

How to disable Windows Defender automatic updates

Every time I resume my computer and try to use it, it seems slow to respond; high disk activity, high CPU usage and low on memory. I have confirmed that it is caused by Windows Defender automatic ...
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Is there any simple way to restrict all Windows 10 services allow only local subnet with Windows Defender Firewall?

I have a Windows 10 computer in my home local subnet. Now I configured Windwos Defender Advanced Firewall security's Remote Desktop rules to allow scope 'Local subnet' My subnet is behind of my home ...
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43 views

Getting functional output from Windows Defender over command line

Writing a powershell script for one of our automated processes, and I'm delighted to see I can use MpCmdRun for the scanning. Only problem I've found is, when running it against a file, the only ...
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131 views

What is the relevant “Core Networking” item in Windows Defender Firewall for DNS over TCP?

In Window 10, the Windows Defender Firewall, the relevant item for standard DNS over UDP is "Core Networking - DNS (UPD-out)" You can enable/disable specific IP addresses in this rule. Some ...
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55 views

Why did Microsoft Defender detect this simple and harmless program as a “Severe” threat?

I wrote the following program in C to test how the Windows API function PathCchRemoveExtension works: #include <Windows.h> #include <strsafe.h> #include <pathcch.h> #include <...
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208 views

Why, when I right-click a single file and go “Scan with Microsoft Defender”, does it start scanning my entire system?

I've done it numerous times now, with the same result every time. It didn't use to do this weeks or months ago. It doesn't just scan that file, but my entire damn machine. Which means it never ends, ...
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41 views

Does removing a drive letter prevent Windows Defender from scanning the drive?

I have one drive which is split into two partitions. One partition has Windows 10 installed and another has Windows 7. Does removing a drive letter trought Disk Management in Windows 10, of Windows 7 ...
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105 views

Can't disable Windows Defender

I need to disable windows defend but I'm not able. I think i messed up in the regedit section in the past and now all the settings can't be changed. I tried deleting the files i added in regedit but ...
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114 views

Does Windows Defender on Windows 8.1 provide same protection as on Windows 10?

I'm concerned about reliablity of Windows Defender.I currently use Windows 8.1 and don't use any other antivirus programs. When I checked online, all the reviews of Windows Defender were that of the ...
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1k views

Does Windows defender protect from viruses on USB flash drive

This topic seems not to be described by Microsoft. At least I could not find any information. I am using Windows 10 with the default settings on Defender. My question is: when I put an infected USB ...
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490 views

Powershell cannot write to registry key HKLM:\Software\Policies\Microsoft\Windows Defender\Real-Time Protection

I would like to add a registry key using Powershell to set a group policy that disables OnAccessProtection in Windows Defender, with the following producing no error running as Admin, but doesn't do ...
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147 views

Enabling Windows defender to block USB Malware automatically

I want to turn on the Windows Defender Option preventing malware spreading from USB stick.
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94 views

What benefits does Windows Defender give me with a Microsoft Account?

Windows Defender wants me to sign in with a Microsoft Account for "enhanced security and other benefits". However it doesn't explain what these benefits are. Also the website the program ...
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PUA:Win32/Vigua.A => GC.Communcator.exe unknown windows defender detected threat [duplicate]

Does anybody know what this is or might be, I have heard the name Proffessor "Eric Laithewaite" before as I have watched some of his electronics videos on Youtube and possibly downloaded ...
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1k views

Microsoft Defender Antivirus is disabled, but back to normal after reboot. How to disable it permanently?

I have Windows 10 ver 2004. Since Windows Defender changed to Microsoft Defender Antivirus I'm unable to turn it off. In Local Group Policy (gpedit.msc) under Computer Configuration/Administrative ...
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171 views

“Your administrator requires a security scan of this item. This could take up to 10 seconds.”

Every time I build and run a Visual Studio project, I get this warning and my program takes much longer to start up, even for a simple hello world program. I looked around and I think this might be ...
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1k views

How to disable Tamper Protection on Windows 10 1709, 1803, or 1809?

According to the documentation: If you are using Windows 10 OS 1709, 1803, or 1809, you won't see Tamper Protection in the Windows Security app. In this case, you can use PowerShell to determine ...
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1answer
194 views

Windows Defender won't let an external drive (WD My Book) sleep

Well, the topic title says it all. I recently purchased a Western Digital My Book 8TB and no matter what I couldn't get it to stand by/sleep. I tried everything: messing around with USB power options, ...
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518 views

Disabling Windows Defender via registry, group policy, rename it's folder or deleting it from the %SystemRoot% doesn't work, how do I solve it?

Recently (at least from build 2004 on, I didn't notice if it was an issue before) Microsoft has added the "nice" feature that makes it impossible to disable Windows Defender at all. All ...
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14 views

Removal of UTorrent, Win\32CandyOpen and CCleaner labelled as PUP

the three named above were downloaded unknown to me as bundled software. Win 10 vs 2004 Defender scan labels these as potentially harmful. Do not see these programs in AppData Roaming, Apps and ...
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189 views

Total Commander: Comparing files is slow because of Microsoft Defender Antivirus

I use Total Commander and Microsoft Defender Antivirus. I noticed that comparing directories in Total Commander (go to Commands > Synchronize Dirs ..., select the "by content" checkbox, ...
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3answers
3k views

Windows defender flags an app but Norton says it's fine

I'm trying to download Lychee Slicer from Mango3D.io. I followed their suggestion by telling windows defender to allow it to download. Then I scanned it with Norton. Norton said both the website ...
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2answers
241 views

Disable Win10 security (Defender, Antivirus, whatever)

I had problems with Windows 10 since very first day. Horrible OS, but my new PC can support only this (no Win7 sadly). Now I'm having a new problem, as well as many other people - Windows keep on ...
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1answer
4k views

Windows Defender won't delete or restore quarantined threat

Windows Defender has quarantined two threats on my PC recently: one is an infected executable on a network share (which was put there deliberately and which someone needs), the other is a simple "...
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1answer
1k views

Controlled folder access blocks svchost.exe application

Yesterday I enabled controlled folder access in Microsoft Defender Antivirus (Update & Security > Windows Security > Virus & threat protection > Settings > Controlled folder access ...
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Microsoft Defender Antivirus stops scanning after a threat is found

Yesterday I uninstalled Avira antivirus and started using Microsoft Defender Antivirus. Today I ran Full scan. After scanning about 3.03 million files in 45 minutes it found a threat in an old ...
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433 views

Windows Defender re-enables itself by deleting DisableAntiSpyware key on real hardware (but not in VM); any workaround?

From my "testing Windows 10 in VM is almost pointless" saga... the next episode: On real hardware Windows 10 LTSC 1809 re-enables antivirus on every boot by deleting the DisableAntiSpyware ...
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179 views

Why does Windows Defender suddenly classify %windir%\System32\drivers\etc\hosts as HostsFileHijack?

I've installed the MVPS Hosts blacklist to my etc\hosts file in order not to be tracked. Today, Windows Defender scared me by telling me it detected SettingsModifier:Win32/HostsFileHijack in spite of ...

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