Tag Archives: Defender

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

[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

[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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How to find weak passwords in Active Directory and eliminate them with PowerShell

[Sponsored Post]Weak or compromised passwords are a known gateway for attackers. If you are able to identify which users in Active Directory (AD) are threatened by this, then PowerShell can help to remedy it. However, PowerShell scripts cannot eliminate basic AD deficits, other tools are needed for this. More ...

Microsoft Defender blocks Anydesk clients (since 28 February 2024)

[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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Test Defender rules for ASR, PUA, SmartScreen etc.

[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

[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

[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?

[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?

[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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Microsoft fixes Windows Defender LSA bug in Windows 11 with update KB5007651 (version 1.0.2306.10002)

[German]Wonders may yet happen. I have the first reports that Microsoft has fixed the Local Security Authority (LSA) issue that has been simmering in Windows 11 for months. It was caused by an update, and as a result, certain features … Continue reading

Posted in Security, Update, Windows | Tagged , , | 4 Comments

Windows Defender: High load since update 1.391.2901.0

[German]Microsoft has just rolled out an update for the Windows Defender scan engine to version 1.391.2901.0. Now I have a report that this drives up CPU usage, e.g. when printing. Remedy is to remove the definition update. Advertising

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