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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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Windows 10 Norton.exe Trying to Access Controlled Folders

I don't really know much about computers lol but this has been bothering me. I turned on controlled folders a small while ago, just because I thought it was good to have on, and around the same time, ...
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What should be in the Windows Defender, Diagnostics folder in the registry?

How many entries should there be? One Windows 10 PC has 6 entries, another has 3, in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft Defender\Diagnostics. Examples, from one machine:- RollbackToPlatformVersion ...
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Windows Defender Application Guard has no internet access

We are testing the use of Windows Defender Application Guard. It is enabled, and I can access it through the Edge Settings menu, but once on the application guard edge browser we seem to get no ...
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Exclude WSL 2 VM from Windows Defender

I'm trying to exclude my Ubuntu VM in WSL 2 running in an up to date Windows 11 Pro installation. The problem is that my local build is terribly slow when Windows Defender is active. Setup is as ...
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How do you download the latest Windows Defender platform engine for offline PC, as well as the definitions?

How do you download the latest Windows Defender platform engine, as well as the definitions? It is for computers that are not online yet, I would like to do this for both Windows 8.1 and Windows 10. I ...
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Windows Cloud PC Cannot change Windows Defender Firewall default behaviour for outbound connections

I'm trying to set the properties of Windows Firewall to Block outbound connections via Windows Defender Firewall with Advanced Security. This machine is a Windows Cloud PC that is provisioned with ...
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How can I prevent Windows Defender from using my computer's CPU on Microsoft Windows 10?

I use Microsoft Windows 10. I don't want to use Windows Defender. Therefore I disabled it, but it continues to use my computer's CPU. How can I prevent that? Here's how I tried to disabled Windows ...
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Make windows go to sleep after waking for and running a task

So, I put my Windows computer to sleep whenever I am not using it. So I want it to wake up, run a task, and then go back to sleep when it finishes. The primary example of wanting this is with when ...
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Windows 11 Security alert - but no results for Windows Defender in the Windows appstore [duplicate]

I've upgraded to Windows 11. Now I see this alert in the taskbar: In Windows 10 I would doubleclick this icon and the security center opens. Nothing happens now. Rightclicking gives some options, ...
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No Windows Defender in Windows 11 Home [duplicate]

I need to disable real time protection. For this reason I go to Windows Security >> Virus & thread protection. I got message You'll need a new app to open this windowsdefender link and link ...
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How to find a potentially unwanted app reported by Windows Security if it's not showing its name?

background I noticed recently how my laptop is running slower. Poor responsiveness while typing. Google Chrome and System (ntoskrnl.exe) are the 2 processes that load the CPU the most. I've already ...
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Is Windows' "Antimalware Service Executable" slowing down my system backup to NAS?

I am trying out a new program called "Ashampoo Backup Pro 16" to do a complete (and later incremental) backup of the most important drives in my desktop PC (Win10 21H2, Ryzen 7 3700X, 24GB ...
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Take ownership greyed out

I am the system administrator. I took ownership of those directories: C:\Windows C:\Program Files C:\Program Files (x86) I gave myself full permissions without any problems. Recently i noticed an .exe ...
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3 votes
2 answers
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How to disable Windows Defender

I tried to add DisableAntiSpyware in the registry which works OK but only until a reboot. Bear in mind that I don't want to disable all Defender features, just the real-time protection permanently (...
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1 vote
1 answer
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Windows Defender Advanced Threat Protection Service won't start and unable to change Startup Type from Manual

(I'm running Windows 11) Windows Defender is running and Real-time protection is turned on according to the Windows Security settings page. Screenshot The screenshot shows the highlighted service from ...
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Is there any point in scanning video files with MS Defender?

I have a policy of always scanning any newly-aquired files with MS Defender before I open them. But I've noticed that if I scan a video file then no matter how large the file, MS Defender will near-...
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Microsoft Defender Antivirus not in Group Policy Management Editor

I have a windows server 2016 virtual machine that I am trying to configure the group policy of. However the option for editing the policy for Microsoft defender antivirus however it is not there. It's ...
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2 votes
1 answer
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Windows Defender seems to be flagging Java applications

I'm trying to evaluate some software tools (ERD diagrams) and have downloaded dbSchema and ModelXtractor. Attempting to install either tool results in a Windows Defender popup: dbSchema provides ...
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Does the "PlatformRollbackMethod" Windows Defender event indicate an issue?

For about a month I've been seeing this "PlatformRollbackMethod" in event viewer (Microsoft-Windows-Windows Defender/Operational) Is this a common event, or an unusual one that might ...
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How to unblock an outgoing port in Windows (Windows 10 Pro)

It appears that Outgoing Port 22 is blocked in a windows machine that I'm working with. The reason I think this is that I cannot SSH into anything using the windows terminal or Putty. I tried a few of ...
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Windows Defender service won't start (Access Denied)

I wanted to install XBOX app but whenever I install it I got the error looks like something went wrong 0x80073D0A I looked this code and it seems it wants Windows Defender to be on, so I went to ...
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Windows Defender Exclusions

If a virus added itself to windows defender exclusions, it will never be scanned. However would windows defender still remove its startup registry keys and scheduled tasks? Windows defender is the ...
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Disable Windows Defender in Windows 11

How to disable Windows Defender in Windows 11 (Professional) (i.e. prevent Antimaleware Service Executable to spin up my (completely disconnected) Laptop's fans)? The top answer of Disable Windows ...
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1 vote
1 answer
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windows11 and windows defender performance issue

I moved my laptop to windows11 about a week ago and after 3-4 days I started hearing CPU fan noise the first time, especially while I am not using the laptop CPU getting high usage. And catch the ...
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How can I tell if a Microsoft Defender exclusion is working?

Windows Security has the option of adding exclusions for files, folders, file types, and processes. On a resource-constrained PC, I would like to add the programs that I use the most to the exclusion ...
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Windows Defender Advanced Threat Protection eating all available ram before crashing

For couple of days now I've been experiancing issues, where Windows Defender ATP process just starts to grab all my RAM, reaching up to 40GB of 48 available and then crashing. I've noticed a lot of &...
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SSD disk active time always 100%

I need your help because Im going crazy with my laptop. The problem is that my SSD disk's (NVMe ADATA SX6000PNP) active time is basically constantly 100% and - I assume because of that - my laptop is ...
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Windows 10 Home Ed - Base Filtering Engine won't start (Access Denied) Error 5

I am running Windows 10 Home Edition. I cannot run Windows Defender Firewall because it is dependent on Base Filtering Engine which is not running, does not run on start-up and I cannot run as ...
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I enabled Memory Integrity but cannot disable it again. How to turn it off?

I have a 5800H/RTX3060 Windows 10 Pro Laptop and I turned Windows Security: Core Isolatio/Memory Integrity ON to see how benchmark are affected. After I'm done I tried to disable it again, but it does ...
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Enable Windows Defender Tamper Protection using PowerShell or C#

I understand completely that it's not possible to disable tamper protection programmatically, as this would defeat the point. Though, seeing as it's possible with an InTune or Endpoint license, then ...
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If I've found a potential threat on my computer, is it advisable to wipe other laptops on that network?

A while back, µTorrent was flagged by Windows Defender as a low priority program with "potentially unwanted behavior" on my home desktop computer. I've since removed those files. (https://...
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How can I stop windows updates from checking for security intelligence updates?

So I renamed the windows defender folder (C:\ProgramData\Microsoft\Windows Defender) in order to disable it entirey and it works but there's one problem, windows updates still tries to download ...
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How can i solve "package not registered" while trying to open windows security

The issue is that it doesn't open, whenever i try to open it it says: "Package could not be registered" i have updated windows from 8.1 to 10, and since then, the issue started sfc /scannow ...
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automatically update Microsoft Defender Antivirus defentions - Windows 10 Pro

tl;dr I would like Windows Update to automatically download and install only the updates "Security Intelligence Update for Microsoft Defender Antivirus". Currently, Windows Update policy is ...
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Hide exclusion list in Windows Defender GUI?

First time posting here. Does anyone know if it's possible to hide the exclusion list in Windows Defender GUI? In our enterprise setup we have quite a few exclusions - but we don't want them to be &...
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How do I make Windows Application Guard automatically activate any time I visit a domain not in a 'safe list'?

For added security, I want Windows Application Defender to activate anytime I attempt to visit a domain that I have not deemed safe. Is this only available in Enterprise-managed mode? I attempted to ...
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1 vote
1 answer
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Is it possible to run Windows Defender offline in full scan mode?

I am testing Windows Defender in offline mode. I set these two GPO entries Turn off realtime protection: Enabled Turn off routine remediation: Enabled I placed a EICAR test virus in c:\ and started ...
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Windows defender won't finish scanning archives

I recently run into an issue where Windows Defender wouldn't finish a full scan (it would scan files infinitely, reporting unrealistic number of files scanned). Now I think it's due to my RAR archives ...
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Windows Defender scans more files than there are on my drive

I'm trying to run a Windows Defender full scan, but it seems to be scanning more files than are on my PC (32M files) and the progress bar doesn't move, even though the number of files scanned ...
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How to add a folder or file in Windows Defender Exclusions programmatically?

There is this Stackoverflow question but it is outdated since it is 4 years old and things have changed. It doesn't work anymore. Do you guys know any updated solution?
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How to fix "You'll need a new app to open this windowsdefender link" when trying to open Windows Defender in Win 11 Preview? [duplicate]

I have upgraded to the Windows 11 Preview through the beta program. Trying to start Windows Defender yields in an error message: Googling the issue, there is supposed to be a fix for Windows 10 by ...
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5 votes
2 answers
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You will need a new app to open this windows defender link

I have recently upgraded to Windows 11 which is now on the Beta Channel, the only unofficial problem I have is with Windows Security. Here's What I get when I try to click on any Windows Security link ...
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Disabling Real Time Protection in Windows 10 by a PowerShell

I'm trying to disable Real Time Protection in Windows 10 by a PowerShell. So far I tried Set-MpPreference -DisableRealtimeMonitoring $true and sc stop WinDefend, none of them 2 is working. Is there ...
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Windows Task Scheduler Scan Result 0x2 - a new solution?

I'm trying to schedule a daily Windows Defender scan on my Windows 10 PC using Task Scheduler but it always fails with a 0x2. By itself that's old news - the problem has been around for years and ...
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Get virus/threat information from microsoft via threat id [closed]

I don't know if this is the right place for a question like this but: first, I have a virus report from windows defender with a threat id. For example this is the threat id of the eicar testfile: &...
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Why windows security doesn't show the last two excluded folders?

Operating System: Edition: Windows 10 Pro, 64 bit Version: 21H1 OS build: 19043.1151 Windows security doesn't show me the last two folders that I excluded. I noticed this when I went to regedit ...
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Windows 10 suddenly refuses to run VBS script [Code 800A802D]

Windows Version: 21H1 (OS Build 19043.1151) [Windows 10 Pro 64-Bit] AV is Windows Defender & brain.exe Now to my problem: Since recently I no longer can run my VBS script. error-msg and exclusion -...
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How for force all new Wifi network connections to be PRIVATE?

I found how to do this with a router or ethernet card. With the wifi adapter, each connection is treated as a new one. I set up Windows Defender firewall to block non-VPN traffic, following this guide:...
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EEPC has been corrupted

Just booted my computer and got this message at boot time: "EEPC has been corrupted" Could not boot back into windows. When i booted an ubuntu livecd i saw that all the files were ok. ...
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Microsoft Defender ATP “Isolate Device”

How does Microsoft Defender ATP isolate machines from network? Is it done by firewall? or is there any other way of doing it.
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