550 questions with Microsoft Security | Microsoft Defender | Other tags

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Emails being labeled as phishing incorrectly 2

Hello, After this recent update, we are seeing emails that should be sent to the users are being labeled as phishing. The emails in question are from our Salesforce ogs notifying employees of any comments on Customer Complaint cases. Due to this store…

Microsoft Security | Microsoft Defender | Other
asked 2026-05-15T17:12:24.9033333+00:00
Pottinger, Christopher F (he/him/his) 0 Reputation points
answered 2026-05-15T17:12:41.5066667+00:00
Q&A Assist
0 answers

Microsoft Defender

Trying to use the app for the first time. It is telling me it is unable to log into Microsoft Defender. As you can see, I am logged into my Microsoft account. I also have Microsoft 365.

Microsoft Security | Microsoft Defender | Other
asked 2026-05-15T13:02:03.5966667+00:00
Kevin McInerney 45 Reputation points
1 answer

[Inquiry] Repeated False Positive Blocking by CFA (Controlled Folder Access)

Hello, We are a software development company that develops and distributes Windows-based applications. We are experiencing an issue where our legitimate executable files are repeatedly blocked by Windows Defender CFA (Controlled Folder Access) every time…

Microsoft Security | Microsoft Defender | Other
asked 2026-05-15T07:16:08.37+00:00
신 미애 0 Reputation points
edited the question 2026-05-15T07:53:27.6+00:00
신 미애 0 Reputation points
1 answer One of the answers was accepted by the question author.

Microsoft Defender Restricted Entities Page Not Updating Properly

I noticed that changes made in the Restricted Entities section of Microsoft Defender are not reflecting correctly. Actions appear to process, but the portal does not update as expected afterward. I have already tested with multiple browsers and refreshed…

Microsoft Security | Microsoft Defender | Other
asked 2026-05-14T05:06:54.8066667+00:00
Somil Jain 580 Reputation points
accepted 2026-05-15T01:26:00.98+00:00
Somil Jain 580 Reputation points
1 answer

WIFI is getting auto disconnect while working.

The Wi-Fi connection is automatically disconnecting during work. Troubleshoot steps : Troubleshooting Steps Taken: Updated Wi-Fi driver Updated BIOS and firmware Installed latest Windows patches Tested by logging in with another user account Disabled and…

Microsoft Security | Microsoft Defender | Other
asked 2026-05-14T09:25:40.9833333+00:00
Bokefode, Sachin R 0 Reputation points
answered 2026-05-14T09:26:02.7966667+00:00
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1 answer

Windows Cloud Files Filter Driver (CldFlt) randomly getting disabled across multiple users — causes OneDrive Files On-Demand failure/disappear and mass re-download of sharepoint folder (Windows 11 25H2)

Multiple users in our Windows 11 25H2 tenant (Build 26200.8457) are experiencing a sudden failure where every file synced through OneDrive (Office, PDF, etc.) becomes unopenable with "file format or file extension is not valid" errors, and…

Microsoft Security | Microsoft Defender | Other
asked 2026-05-14T07:00:56.4533333+00:00
Jayadeepan 0 Reputation points
answered 2026-05-14T07:01:26.52+00:00
Q&A Assist
1 answer

Why am I being charged $300 for Defender Express

Why am I being charged $300 for Defender Express...

Microsoft Security | Microsoft Defender | Other
asked 2026-05-13T16:16:49.96+00:00
Jennie Tweedy 0 Reputation points
answered 2026-05-13T16:17:11.4633333+00:00
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2 answers

OpenSSL Vulnerability in On-Premises Data Gateway

We have On‑Premises Data Gateways installed on one of our servers, running the latest update (version 3000.298 from December 2025). However, Microsoft Defender for Endpoint is still detecting OpenSSL vulnerabilities in DLL files. Is there an official…

Microsoft Security | Microsoft Defender | Other
asked 2026-01-16T12:34:58.06+00:00
Olga Lavrinets 50 Reputation points
commented 2026-05-12T04:03:27.2866667+00:00
kiwiant 0 Reputation points
2 answers

Need Help Restoring Access to a Hacked Microsoft Account with Changed Email.

Last night, I was hacked. My social media accounts are fine but my personal microsoft account's email for microsoft 365, teams, one drive and etc. for my personal microsoft account was terminated from the subscription and changed into an unknown email…

Microsoft Security | Microsoft Defender | Other
asked 2025-07-25T15:40:24.08+00:00
Vilte Janionyte 0 Reputation points
commented 2026-05-11T15:44:43.5033333+00:00
Jesus Esteban 0 Reputation points
0 answers

Defender for Endpoint consistently triggers twinapi.appcore.dll crash cascade on Azure AD joined BYOD device - reproducible, confirmed, need guidance

TL;DR: Defender for Endpoint consistently triggers a twinapi.appcore.dll crash cascade on my Azure AD joined BYOD device, breaking AAD BrokerPlugin, UWP apps, and Teams authentication. Device is completely stable without MDE installed. A stale Intune…

Microsoft Security | Microsoft Defender | Other
asked 2026-05-11T13:37:51.3833333+00:00
TwinApiSurvivor 0 Reputation points
0 answers

When Microsoft Defender will support Ubuntu 26.04?

Hello, according to https://learn.microsoft.com/en-us/defender-endpoint/mde-linux-prerequisites#supported-linux-distributions it still has no support for newest Ubuntu 26.04 LTS. Script…

Microsoft Security | Microsoft Defender | Other
asked 2026-05-11T06:42:50.07+00:00
Jacek Łacny 0 Reputation points
1 answer

Windows 11 Defender firewall access

What are the best Windows 11 Defender firewall access settings for a typical non-professional home user

Microsoft Security | Microsoft Defender | Other
asked 2026-05-11T00:03:31.9666667+00:00
aviemack 0 Reputation points
answered 2026-05-11T00:03:49.2833333+00:00
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2 answers

Trojan:Win32/JScealTaskExec.AA From last two days i am facing this issues

From last few days i facing issues of trojon virus attack in my system i have applied all the process but still not working again and again threats found option showing please gudie me Virus description :- CmdLine:…

Microsoft Security | Microsoft Defender | Other
asked 2026-05-10T20:22:42.8333333+00:00
Ramkrishna Bhunia 5 Reputation points
answered 2026-05-10T23:31:31.41+00:00
_AW_ 67,251 Reputation points Volunteer Moderator
1 answer

is windows removing the threts it found on my computer? It says its working on it.

ran windows defender it found trogans how do i know if tis removing them?

Microsoft Security | Microsoft Defender | Other
asked 2026-05-10T18:17:57.2533333+00:00
Joseph Tillinger 0 Reputation points
answered 2026-05-10T18:18:10.9266667+00:00
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0 answers

how to download SecurityHealthSetup.zip for windows 11

Having blank screen in windows security and not able to do any thing

Microsoft Security | Microsoft Defender | Other
asked 2026-05-10T11:16:53.3966667+00:00
Hanzala Jameel 0 Reputation points
commented 2026-05-10T12:28:31.7866667+00:00
Somil Jain 580 Reputation points
1 answer

How to fix blocked access to windows security

I cannot turn on virus and threat protection due to blocked access to windows security on my pc windows 11 pro 25H2

Microsoft Security | Microsoft Defender | Other
asked 2026-05-10T11:32:12.8033333+00:00
Sydney 0 Reputation points
answered 2026-05-10T11:32:27.0533333+00:00
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0 answers

Microsoft Defender SmartScreen blocking the installer

We have an installer using Azure Key Vault OV Code Signing certificates but still on installing the application we are getting this warning "Microsoft Defender SmartScreen prevented an unrecognized app from starting. Running this app might put your…

Microsoft Security | Microsoft Defender | Other
asked 2026-05-08T15:00:05.75+00:00
Prabjyot Kaur 0 Reputation points
commented 2026-05-09T03:09:46.6866667+00:00
Somil Jain 580 Reputation points
1 answer

Trojan:Win32/Cerdigent.A!dha

Ran a full scan. Still shows as a threat. Take action does nothing,

Microsoft Security | Microsoft Defender | Other
asked 2026-05-07T12:44:01.5033333+00:00
CountryBoy 0 Reputation points
answered 2026-05-07T13:09:54.2766667+00:00
Gérard Oomens 122.3K Reputation points Volunteer Moderator
1 answer

Issue with Microsoft SmartScreen and DigiCert

So I work for a software company, and we use DigiCert certificates to sign our applications. A few weeks ago we suddenly started getting Microsoft SmartScreen “unrecognized app” warnings across all our applications. The strange part is that nothing…

Microsoft Security | Microsoft Defender | Other
asked 2026-05-07T12:18:38.4233333+00:00
Valeriia 0 Reputation points
answered 2026-05-07T12:19:00.5533333+00:00
Q&A Assist
3 answers

Trojan:Win32/Cerdigent.A!dha

I have gotten this threat Trojan:Win32/Cerdigent.A!dha, it blocks it but it keeps coming back as it detects it. How do I remove it? Respectfully

Microsoft Security | Microsoft Defender | Other
asked 2026-05-03T13:25:47.2633333+00:00
Jaka Vujcic 5 Reputation points
edited a comment 2026-05-07T10:47:51.56+00:00
HamzaHaddougui 0 Reputation points