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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33 views

Popup that I see for the first time

The popup What's this? When I close it, it shows again. I am asking because it needs my password. I saw it for the first time when I turned on computer yesterday. I am using this computer 2 years. ...
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How to Exclude Backup and Restore Service from Windows Defender in Windows 10?

Running Backup and Restore on Windows 10 1909, I noticed that the backup was very slow because Windows Defender (MsMpEng.exe) used most of the CPU time. In the Windows Defender configuration I ...
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Microsoft Defender Firewall is … unsafe : WSL access?

I would like to access my X server from WSL 2 so I disabled the interface alias with : Set-NetFirewallProfile -DisabledInterfaceAliases 'vEthernet (WSL)' but now, I have a message from my security ...
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28 views

I installed a virus and i can't turn my windows defender on [duplicate]

so i basically downloaded a virus a few weeks ago, i removed the virus sucessfully but it still let me windows defender on broken i tried to change it in services but it was disabled so i tried to ...
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61 views

Group policy does not work on Windows 10 home edition?

I'm using Windows 10 home edition, try to solve update Windows Defender Antivirus antimalware platform - KB4052623 (Version 4.18.2001.10) error code 0x80070643 According to this Microsoft web page, I ...
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Windows Defender command prompt quarantine control - how to use MpCmdRun.exe to see the same thing the GUI sees?

When working with Windows Defender, it appears that a command prompt version of the utility is available to control certain functionality. See details on mpcmdrun.exe here. One thing it indicates is ...
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87 views

Why is Defender flagging bitmask_helper as a trojan?

For a few years now, I've been using the excellent RiseUp VPN from the RiseUp project. However, since moving from Windows 7 to 10, I've noticed that Windows Defender consistently flags the bundled ...
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44 views

I have accidentally put ransomware protection on my C drive

I have enabled ransomware protection but accidentally put c drive in my protected folder now it is not letting me change any settings neither is it letting me disabling the setting. Help
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Two context menu options to scan file with Defender

Shortly after installing MalwareBytes (Free), I lost the file context menu option to scan a file with Defender. I added it back using the registry modification posted in this question. The resulting ...
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57 views

Why Mandatory ASLR (Force Randomization for images) in Windows defender has issues with portable apps?

I'm using the latest build of Windows 10, 1909. when I turn on Mandatory ASLR in Windows Defender Exploit Protection, I can't launch portable programs. for example I have Internet Download manager ...
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35 views

How to disable windows defender and security screen permanently? [duplicate]

I am trying to disable Windows Defender PERMANENTLY with O&O ShutUp10, but switch is not changing when clicking it. How to disable windows defender? Please, do not advice method with Settings -> ...
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61 views

Windows deleted my uTorrent.exe file - not listed in W Defender

I was surprised yesterday when I tried to run uTorrent and the .exe file was missing. I looked up in Windows Defender quarantine and deleted files but it was not listed. It has been a month or so ...
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61 views

MalwareBytes re-installation removes single-file scan from context menu

I was forced to reinstall MalwareBytes in the process of updating the virus definition. MalwareBytes is now the main AV. The Windows Security Centre has a Virus & threat protection subpanel ...
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205 views

Is there any way to turn off tamper protection using command line?

I work with many test PCs, so I want to automate the procedure for installing OS and setting up. Disabling anti virus is one of the set-up steps. For doing it, I used reg add "HKLM\software\...
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89 views

Improving NTFS performance for small files

I would like to know if there are things I can do to improve the performance of NTFS when working with lots of tiny files, such as is the case when working with Git, Subversion, NPM or other tech that ...
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39 views

How to stop real time antivirus in Windows 10

I switched tamper protection off, edited group policy, rebooted quite a few times, and yet Windows 10 still switches it back after about a day or so. How could I stop this? (Version 10.0.18362.657)
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Group policy fails to disable Windows Defender on Windows 10

I have Windows 10 enterprise x64 1903 18362.592 which has been installed for at least 6 months. I had windows defender disabled via group policy. Since a recent update defender real time scanning ...
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78 views

Is there a way to check if the files in the Windows Defender Offline Scanner folder are corrupted?

On a Windows 10 PC, I opened the folder "...ProgramData\Microsoft\Windows Defender\Offline Scanner" clicking 'continue' to allow access, not thinking at the time that it would allow any program ...
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109 views

Is it possible to stop the Windows defender SERVICES?

Local admin account | Win 10 1903 I have turned off the firewall and antivirus successfully but the services are still hanging around in the background and use CPU for a second when launching ...
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1answer
173 views

VMware Workstation and Defender Credential Guard (without HyperV) [duplicate]

I'm trying to run a virtual machine in VMware Workstation Pro 15 and I get an error message saying that I need to first disable Defender Device/Credential Guard. I didn't know this was enabled so I ...
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83 views

Can Win10's defender prompt user before taking actions

When updated to Win10, I choose to use its built-in Defender as my antivirus software, It works well ,but when finding virus, it directly quarantine or delete files without any alert to users, so my ...
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3k views

How to disable Windows 10 defender service (W10 1909)

On Windows 10 1909 enterprise, I have a process "Antimalware Service executable", within which the service: "Windows defender antivirus service"; which takes 115BM of memory. However, in group policy,...
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70 views

Attempting to start Windows Defender fails with error code 577

I'm trying to enable Windows Defender on a few Windows machines I manage. When first configured the machines had all the related group policies for Windows Defender turned off, so I created a small ...
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363 views

Windows defender just removed sudo on my debian WSL, can I restore this?

So basically, i restarted my laptop and got the latest security updates. When i logged into my debian WSL i tried to do a sudo command and got a pop up from windows defender. Windows defender found a ...
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134 views

Corrupt Defender on Windows Server 2016 0x8007007e

These are the facts: a) Listing (by cmd dir or any other way) of C:\Windows\servicing\Packages needs around an hour, which is much too much, during this time the files are all the time accessed by ...
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37 views

Windows Defender says Eclipse Kepler 4.3.2 is “unsafe to download”

I'm trying to download Kepler (Eclipse 4.3.2) from the eclipse.org site, but after pressing Open at the bottom of my browser in order to run the installation, instead a red-outlined box appears in its ...
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1k views

Can't disable Windows Defender using group policy and registry

I wish to disable Windows Defender on my fresh Windows 10 install. I know I have to enable the policy Turn off Windows Defender Antivirus in Computer Configuration > Administrative Templates > ...
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What to do with the file which is not handled by AVG or Windows Defender?

I have installation pacakge en_biztalk_server_2016_developer_x64_dvd_9520931 and it contains file ...Utilities/ReplacePublicKeyToken/ReplacePKT.vbs and AVG is scanning this file for tens of hours, it ...
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415 views

Windows 10 memory integrity doesn't start due to incompatibility

I am using windows 10 v1809. Whenever I try to turn on windows memory integrity, I get an error saying that windows memory couldn't start because there MAY be an incompatibility. I know that my ...
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263 views

How can I “pre-authorize” my app so that Windows Defender allows network access?

I'm developing an application I'm a programmer (but not typically for Windows desktop or services). I'm writing an application. I want to distribute this application privately (not through the ...
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1k views

Can't disable windows defender real-time protection

I'm trying to disable real-time protection, but it says it is managed by my administrator, but it's my own computer and i'm the administrator, what can I do? I am using Windows 10 Home, so I don't ...
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142 views

Windows Defender using 50% cpu. Can I ask it what it is spending its time on?

I am a Java developer and have a company Windows 10 PC where the Windows Defender Antivirus service typically uses 40-50% CPU and 10-20 MB/s disk according to task manager. After being idle all ...
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33 views

Windows Defender ATP data storage location

While I setup Windows defender ATP fro my Org. Can I select any other Data Storage location. I like to save it in Australia. Can I host it in Azure?
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81 views

Is “real time protection” on Windows affected by the configured Exclusion list?

I want to disable "real time protection" for certain folders on Windows 10. Will adding to the Windows Defender Exclusion settings do that? Settings > Update & Security > Windows Defender > ...
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175 views

Add exclusion to Windows defender from Real-time protection only

How do I add exclusions to file/folders from real-time protection only? I would like these files/folders to be scanned on scheduled scans but exclude from real-time protection. I know that other ...
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263 views

msmpeng.exe writing huge TMP* files to c:\windows\temp

We're having the following problem on one of our Windows 10 (version 1903) workstations. At random intervals, about once every two days, msmpeng.exe starts writing files of up to 15GB to c:\windows\...
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1k views

Your IT administrator requires a security scan of this item - *what* item?

I'm working in Visual Studio 2019 on Windows 10 and from time to time I've been getting this notification: I don't use any 3rd-party antivirus or antimalware programs, so I gather it's coming from ...
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2k views

Windows Defender Fails To Update Definitions (even via manual download & install)

My Windows 10 LTSC 2019 installation can't seem to update Windows Defender definitions. Although there are countless discussions online about definition update failures, I've tried every solution I ...
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177 views

Is it possible to lower CPU usage of Windows Defender Antimalware Service Executable?

I am using my Windows 10 laptop for development and that is why it has more than 20.000.000 files on it, it is OK, they all are safe, I can say this after lot of scans. I have habit to run ...
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520 views

Is there no way in Windows Defender to exclude a folder from realtime scanning but still include it for scheduled scanning?

According to the documentation this does not seem possible: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-antivirus/configure-exclusions-windows-defender-...
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4k views

How to prevent windows defender antivirus from deleting a file of a program

I am developing an app in react native. During installing an app (when I run its run-android command in cmd) in emulator antivirus is deleting an exe file as soon as it's downloaded. So how can I ...
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1answer
792 views

Is it possible to assign Windows Firewall Rules to specific adapters?

My IT department has just changed from F-Secure firewall to the built-in Windows Defender Firewall (Windows 10). And it's quite properly, enforced by the group policy so ic an't turn it off. However,...
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496 views

Windows Defender - Exclude network folder “file: \\;LanmanRedirector\”

I have a network folder \\NAS\NAS Storage\... which is also mapped to the drive letter Z. My current Windows Defender exclusions By typing in Windows Security in the start menu it brings me here. I ...
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45 views

Slow as mollasses virus scan on file downloads from Chrome

I run a standard Windows 10 setup, with Microsoft Windows Defender and the only virus and malware tool. I also use Chrome almost exclusively. When I download a large file (~50-100mb), it takes for-...
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584 views

Possible to batch view/restore/delete quarantined files from Windows Defender?

tl;dr: Is there a way to batch-view + restore items that have been quarantined by Windows (10) Defender? In Windows 10, to restore a quarantined file from Windows Defender -- which silently whisks ...
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4k views

How to disable Windows Defender via PowerShell on Windows 10 version 1903+?

So, I need to automatically disable Windows Defender for certain virtual machines via a PowerShell script. Previous to the May update, one could set the DisableAntiSpyware and ...
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92 views

Does my Antimalware slow my computer down even when my CPU usage is under 100%?

I'm working on a Windows 10 Virtual Machine and I am having performance issues. A major cause of my problems seems to be the Antimalware Service Executable. Occasionally it hogs my CPU and spikes my ...
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104 views

Completely disable windows defender notifications windows 8 and 10

We have some screens showing information to visitors (for some products) in front of production lines, these computers are not even connected to the internet nor have user access at all, but the ...
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852 views

Windows Update of Windows Server 2016 against local WSUS server fails

Installing a new environment built around Windows Server 2016 that has some of the servers on a network that can't reach out to the internet, we installed Windows Server Update Services (WSUS) on one ...
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Windows Defender Firewall is completely turned off, yet I still need to whitelist programs to let them work

Discord was constantly connecting/disconnecting when I upgraded to Windows 10. I went into the settings and turned off all virus protection and firewalls. Not just at the top "disable" but I went ...

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