Tag Archives: Defender

Windows 11 24H2: Upgrade from Home to Pro causes issue with Microsoft Defender for Endpoint

Posted on 2024-10-04 by guenni

[German]If someone upgrades a new computer with Windows 11 24H2 Home later to the Pro version (requires a corresponding license), he will run into issues, if Microsoft Defender for Endpoint shall be used. The system cannot  be integrated into Microsoft … Continue reading →

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Microsoft Defender: msmpeng.exe crashes (August 14, 2024)?

Posted on 2024-08-15 by guenni

[German]We had Microsoft's patch day on August 13, 2024, and as a result quite a lot of Windows patches. I got now a report from an English-speaking reader pointed out to me last night that people were having issues with … Continue reading →

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Windows 10: What generates masses of mat-debug*.log files?

Posted on 2024-05-18 by guenni

[German]I'm posting another topic here on the blog that a reader asked me about at the beginning of May 2024. He notes that the Defender Core service under Windows 10 Pro was started unexpectedly just over a month ago. Since … Continue reading →

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Windows Defender reports ExplorerPatcher as PUP

Posted on 2024-03-02 by guenni

[German]ExplorerPatcher is a tool to customize the Windows 11 desktop in the style of Windows 10 (see this ComputerBase article). Daniel contacted me by email yesterday and reported that Windows Defender has been categorizing the ExplorerPatcher tool as malware for … Continue reading →

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Microsoft Defender blocks Anydesk clients (since 28 February 2024)

Posted on 2024-02-29 by guenni

[German]Brief information for everyone. I have just heard from blog readers that the clients of the remote maintenance provider AnyDesk will probably be blocked by Microsoft Defender under Windows from today (28 February 2024). The whole thing is related to … Continue reading →

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Why ISL Online: Critical factors when choosing a remote desktop solution

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Test Defender rules for ASR, PUA, SmartScreen etc.

Posted on 2024-01-22 by guenni

[German]How do you know that Windows Defender and its configuration is correctly implemented and working? I just came across a demonstration and test page from Microsoft. Microsoft provides various files and information there to demonstrate, test and validate the Defender … Continue reading →

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Windows 10/11: Microsoft Defender can no longer be disabled

Posted on 2023-10-17 by guenni

[German]I'm going to address an old issue that might affect administrators who are migrating clients to Windows 11. In some scenarios, applications run very slowly or the system or applications start sluggishly. The clients are underperforming, even if the application … Continue reading →

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Tor.exe: Microsoft Defender triggers an "Trojan:Win32/Malgent!MTB" alert

Posted on 2023-09-30 by guenni

[German]A few hours ago, the Tor browser received a security update that closed a vulnerability. Now Microsoft Defender in the form of Windows Security triggers an alert when the Tor browser is called up and quarantines the tor.exe file. It … Continue reading →

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Windows Defender Credential Guard: Root cause of Windows 11 22H2 RDP issues?

Posted on 2023-08-26 by guenni

[German]Since weeks, administrators have been complaining about problems with remote desktop connections that can occur on Windows 11 22H2. Microsoft announced in July 2023 that they are investigating the problem, and there is probably a workaround. Coincidentally, however, a blog … Continue reading →

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Defender for Endpoint: URL filtering broken?

Posted on 2023-08-16 by guenni

[German]Quick question to my blog readers. I have received a report that URL filtering.in Defender for Endpoint is broken. In this context, it would be interesting to know if there are other people affected or if the reader is an … Continue reading →

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