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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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scanning by windows defender of win10

I use win10's own windows defender to scan viruses. Strangely each time when only 1 file is there, windows defender's scanning report shows>100 files scanned. I did choose the specific file to scan. ...
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2answers
33 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 ...
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1answer
35 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. ...
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1answer
108 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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1answer
78 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 ...
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0answers
43 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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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 ...
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36 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 ...
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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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1answer
396 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 ...
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27 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. ...
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1answer
53 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 ...
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226 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 ...
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1answer
363 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: ...
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1answer
498 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 ...
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3answers
225 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 -...
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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 ...
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0answers
100 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 ...
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1answer
899 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 ...
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1answer
771 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 ...
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1answer
370 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,...
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1answer
540 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 ...
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19 views

windows defender “device disabled”

I'm using windows 10 with symantec endpoint, in the last week the defender suddenly started to "pop up" with the alert that the device is disabled and that there are issues with the symantec EP. this ...
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1answer
211 views

What does Microsoft Active Protection Service (formerly SpyNet) actually upload?

I would like to see an example of data that is uploaded by the "Cloud-delivered protection" (MAPS) in Windows Defender on Windows 10. What steps do i need to take on my Windows machine to review some ...
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1answer
109 views

How to disable Windows Desktop access in Mozilla Firefox?

In Windows 10, the Windows Defender feature "Controlled Folder Access" (added in 1709) prevents unauthorized changes to (among others) the folder %userprofile%\Desktop. According to Windows ...
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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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2answers
797 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 “...
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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 ...
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0answers
192 views

How to add Microsoft Store App to Windows Defender Controlled Folder Access Whitelist

Is there a way to automatically whitelist all Mircosoft Store Apps without the need to mess with the access permissions of Program Files > WindowsApps folder? Of course you can add every single ....
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1answer
80 views

Is it possible to disable Windows Defender in Windows 10 [Home] per user?

I've seen there's plenty of documentation online about disabling Windows Defender system-wide. For example, in this Superuser question (and I bet a couple of duplicates too) a couple of methods are ...
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1answer
1k views

Windows Defender turned off by Group Policy

My PC with Windows 10 Enterprise 2016 LTSB v.1607 installed, automatically restarted for an error (I don't remember the error, I just remember a blue page in Windows style with a sad emoticon face). ...
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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, ...
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1answer
1k 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 ...
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1answer
387 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, ...
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37 views

what triggers windows defender to flag a download?

I'm trying to learn more about computers and often I have to download a file. I find what I consider is a trusted site- for example maybe someone mentioned it on a udemy course I'm taking. So often, ...
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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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440 views

Windows Defender last run result shows 0x2 - on Windows 10, Version 1709, OS Build 16299.192

Not sure why my Windows Defender Scheduled Scan showed 0x2 in the Last Run Result. Did not really bother to check the last run result as it has been running behind the scene nicely and quietly without ...
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0answers
347 views

Restart Windows Defender on Windows 10 Home?

I would like to restart Windows Defender without rebooting my PC. Is this possible? I do not want to disable it permanently. I have tried the following methods: "End Process" on MsMpEng.exe from ...
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0answers
28 views

How can I confirm if/what Windows Defender is submitting to Microsoft through autosubmission?

I'm seeing large uploads taking place at night and am suspecting that it might be windows Defender submitting files. How can I confirm that?
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691 views

Windows Defender reports Fuerboos.C!cl threat inconsistently

I'm not sure of the appropriate forum for this question since it kind of sits between programming and general computer use, but I'll try here because it has nothing to do with code yet. I've been ...
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3answers
751 views

How to Disable Windows Defender on an Azure VM

I'm using Azure's Batch services to unzip very large zip files before processing the unzipped files then deleting them. Unfortunately Windows Defender, which is preinstalled on the Azure VM's I'm ...
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1answer
2k views

Windows Defender reports error 0x800b0100

On startup, Windows 10 pops up the following alert: An error has occurred in the program during initialization. If this problem continues, please contact your system administrator. Error code: ...
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0answers
67 views

Set up Windows Defender to automatically scan as needed?

Is there a way to set up Windows Defender (in Windows 10) so that it performs its periodical scans and updates in the background without prompting user or demanding that a window remain open on the ...
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3answers
604 views

Windows 10 (1703) Defender asks to review the same files to send every day

Every day Windows Defender (Windows 10 build 1703) asks to review files to send to Microsoft When I go into Defender it shows a "sample submission" window with a path "...\appdata\local\google\chrome\...
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0answers
673 views

Why Windows Defender SmartScreen does not show publisher name of a signed executable?

I have purchased a Standard Code Signing certificate from Digicert and I do not understand why my executable, although signed with a certificate from a trusted CA is displayed as Unknown Publisher by ...
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2answers
486 views

Toggle Windows Defender real time protection via Desktop shortcut

Unfortunately sometimes it is needed to disable (and later enable again) the (excellent) Windows defender real time protection. I require 7 clicks to enable or disable Defender real time protection: ...
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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 ...
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0answers
88 views

Files Excluded by Defender. Are these files safe and can be excluded?

When doing a scan of my laptop using Windows Defender on latest version of Windows 10, I notice there are few files are excluded by Windows Defender. You can view the image here: Are these files safe ...
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309 views

Potentially harmful software detected in windows 10

I have a program (a so-called 'packed program') which is continually falsely flagged as harmful software by windows 10. I have allowed this software in windows defender, and added an exception for the ...
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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 ...