Tag Archives: Defender

Windows issue: Defender collides with FMAPOService

Posted on 2022-05-26 by guenni

[German]In April 2022, I had reported issues with Windows Defender on Windows 10 (20H2). From extreme RAM usage to startup problems with Word or effects like black screen after user login has been observed/reported. Some issues were supposedly fixed by … Continue reading →

Posted in Security, Windows | Tagged , , | 5 Comments
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Windows Defender Application Control: Recommended blocking rules (May 2022)

Posted on 2022-05-23 by guenni

[German]In Windows 10 and Windows 11, Windows Defender Application Control (WDAC) and AppLocker are available as features in the enterprise variants (Windows 10/11 Enterprise) as security features (see this post). Now, Microsoft has published a list of recommended blocking rules … Continue reading →

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Microsoft Defender for Business available

Posted on 2022-05-03 by guenni

[German]Microsoft has announced the general availability of Defender for Business as of May 2, 2022. It is a standalone endpoint antivirus protection solution for small and medium-sized businesses. So, the solution goes beyond the Windows-integrated Defender in functionality, providing malware, … Continue reading →

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Defender for Endpoint causes issues with Windows 10 20H2 clients (April 26, 2022)

Posted on 2022-04-30 by guenni

[German]Does Word take an unusually long time to start on Windows 10 clients? Does the Windows 10 20H2 client go into black screen for 2 minutes or more after user login? Or does the event viewer seem to hang when … Continue reading →

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Microsofts Defender flags Google Chrome Updates falsely as malicious (April 20, 2022)

Posted on 2022-04-21 by guenni

[German]Microsoft's Defender for Endpoint (an enterprise security platform, see Got lost in Defender? There is something like a Defender Cheat Sheet available) seems to have run a bit amok once again. Administrators reported that since April 20, 2022, Defender has … Continue reading →

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Defender signatures cause extreme RAM usage (April 2022)

Posted on 2022-04-12 by guenni

[German]Brief information for administrators of Windows systems, especially Windows Server. I have received information that the signature files for Microsoft Defender that have been delivered recently are causing problems. On some Windows Server systems, RAM usage may become unmanageable, affecting … Continue reading →

Posted in issue, Windows | Tagged , , | 5 Comments

Got lost in Defender? There is something like a Defender Cheat Sheet available

Posted on 2022-04-01 by guenni

[German]Indiscreet question to the readers of this blog: Do you still have an overview of exactly what Microsoft is currently doing with its Defender? I confess that I got lost a long time ago and get confused when blogging because … Continue reading →

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New security feature allows driver block lists in Windows 10, 11 and Windows Server

Posted on 2022-03-31 by guenni

[German]Microsoft is working on improving the protection of the current versions of Windows 10, Windows 11 and Windows Server 2016 and their successors against harmful drivers. For this purpose, Windows Defender Application Control (only available in Enterprise editions) or HVCI … Continue reading →

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Microsoft warns of (fixed) Defender spoofing vulnerability

Posted on 2022-03-31 by guenni

Microsoft has sent a security alert by mail as of 30 March 2022, with a warning about a the vulnerability CVE-2022-23278. This is a spoofing vulnerability in Microsoft Defender for Endpoint, which has already been closed in Android and iOS … Continue reading →

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Microsoft Defender falsely detected Office updates as ransomware activity (03/16/2022)

Posted on 2022-03-17 by guenni

[German]It looks like a classic false positive that Microsoft Defender pulled yesterday (Wednesday, March 16, 2022). If you suddenly had Microsoft Office updates quarantined as ransomware on your systems, you were affected by this case. Advertising

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