Tag Archives: Defender

Windows 11: "Windows Security Health Service exe no longer functional" due to Defender update

Posted on 2023-03-18 by guenni

[German]A couple of days ago a German user contacted me with a strong observation. On a fresh installed Windows 11 22H2 he received an event log entry that says (translated) "Windows Security Health Service exe no longer functioning". In addition, … Continue reading →

Posted in issue, Windows | Tagged , , | 4 Comments

Defender Update KB2267602 (v1.383.1400.0 and above) drops install error 0x80070643 – reports low memory

Posted on 2023-03-10 by guenni

[German]Quick question for Windows users and administrators – and specifically for Windows Server administrators – did you encounter Windows Defender signature updates installation errors within the last couple of hours? I'm receiving more and more reader reports that Defender update … Continue reading →

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

Windows 11: "Defender trouble" due to updates KB5022845 and KB5022913 (app startup hangs)

Posted on 2023-03-07 by guenni

[German]Quick note for blog readers who are running Windows 11 22H2. It looks like Microsoft has changed something internally with the February 2022 update KB5022845 and the Moments 2 update KB5022913, which is currently available as a preview. Users who … Continue reading →

Posted in issue, Update, Windows | Tagged , , , | 3 Comments

Is Microsoft Defender killing applications like Outlook again? (Feb 3, 2023)

Posted on 2023-02-04 by guenni

[German]Quick question to the round of administrators and users who use Microsoft Defender as a security solution in Windows. As of today, February 3, 2023, have there been any problems with applications such as Microsoft Outlook or do Office applications … Continue reading →

Posted in issue, Office, Security, Windows | Tagged , , | Leave a comment

ASRmageddon: Why private users were affected, how to restore shortcuts

Posted on 2023-01-16 by guenni

[German]Friday January 13, 2023 Windows users worldwide were affected by a buggy Defender signature update that deleted desktop shortcuts and more via an ASR rule. In a follow-up, I shed some light on why even home Windows 10/11 users could … Continue reading →

Posted in issue, Security, Windows | Tagged , , | Leave a comment

Manage Microsoft Defender on Windows Server via Intune

Posted on 2023-01-15 by guenni

[German]Brief information for administrators of Windows Server systems. How can Microsoft Defender be managed on Windows Server via Intune? Microsoft has an answer to that question.

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Windows deleted shortcuts; Microsoft explains Windows Defender ASR issue Jan. 13, 2023

Posted on 2023-01-14 by guenni

[German]Yesterday, Friday, January 13, 2023, Microsoft pretty much knocked out parts of its Windows user base by rolling out a buggy Defender signature via update. With ASR enabled, shortcuts were detected as malicious in Windows and deleted from the desktop, … Continue reading →

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Microsoft Defender update/ASR deletes desktop shortcuts, taskbar broken, Office apps don't start anymore

Posted on 2023-01-13 by guenni

[German]Currently, there seem to be nasty problems with Windows and Microsoft Office. Users report in the blog that under Office 365, build 16.0.15831.20252, the taskbar in Windows is broken and the Office applications no longer start. In many clients, the … Continue reading →

Posted in issue, Office, Security, Windows | Tagged , , , , | Leave a comment

Microsoft Defender for macOS 101.86.81 issues

Posted on 2022-11-06 by guenni

[German]Mac users who used Microsoft Defender for macOS version 101.86.81 experienced problems (hangs) in connection with Teams. In the meantime, the problem seems to have been fixed by updating Defender before macOS.

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High CPU load, fan on full speed; Windows Defender struggles with Dell SupportAssist

Posted on 2022-10-03 by guenni

[German]Brief information, which I'll cover in this post. Last week a tweet came to my attention in which a Microsoft MVP complained that the fan on his Windows system was running at full speed. A quick look showed that Microsoft … Continue reading →

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