Remote Desktop Phishing Protection in the April 2026 Update Causes Confusion

Posted on 2026-04-17 by guenni

Windows[German]On April 14, 2026 (Patch Day), Microsoft released a fix for Remote Desktop to protect RDP connections against phishing attacks. Users now see a warning message when establishing an RDP connection. This has caused a lot of confusion and issues. I've written a follow-up article providing an overview of the situation, including workarounds. And there are many user comments outlining more insights. Details may be read at my German blog post [use the build-in translator to switch the language].

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Windows 11 April 2026 Updates (KB5083769, KB5082052) triggers BitLocker Recovery

Posted on 2026-04-16 by guenni

Windows[English]The security updates KB5083769 and KB5082052 for Windows 11, released on April 14, 2026, are causing BitLocker issues. Microsoft has since confirmed this in updates to the support articles. However, the prompt for the BitLocker recovery key only occurs in specific configurations that are not enabled by default. Details may be read at my German blog post [use the build-in translator to switch the language].

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ESU Extension (Phase 2) for Exchange 2016/2019 and Skype

Posted on 2026-04-16 by guenni

Update[German]Microsoft has announced an extension of the Extended Security Update (ESU) program for certain legacy software. This includes Microsoft Exchange 2016/2019 and Skype for Business Server, for which ESU "Period 2" is now being launched. This means that organizations can purchase an ESU extension for an additional six months. Details may be read within my German blog post [use the build-in tranlator to switch the language].

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Microsoft April 2026 updates for Office and Windows

Posted on 2026-04-15 by guenni

WindowsOn April 14, 2026 (the second Tuesday of the month, Microsoft's Patch Tuesday), Microsoft released cumulative updates for the still-supported client operating system versions of Windows 10 (with an ESU license) and Windows 11. Microsoft has also released security updates for supported Windows Server versions and for Office as well.

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Microsoft Security Update Summary (April 14, 2026)

Posted on 2026-04-14 by guenni

Update[German]On April 14, 2026, Microsoft released security updates for Windows clients and servers, for Office, and for other products. The security updates address 163 vulnerabilities (CVEs), 8 of which are critical; 2 of these were classified as zero-day vulnerabilities (one of which has been exploited).

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

[Sponsored Post]In the rapidly evolving IT world, choosing the right remote desktop software is critical for organizations that value security, ease of use and reliability. One provider of secure remote access that has been on the market since 2001 is ISL Online, which presents some considerations for choosing such software below. More ...

Windows 11 Enterprise LTSC 2024: Reset issue with hotfix KB5077212 / KB5079420

Posted on 2026-04-13 by guenni

Windows[German]Microsoft acknowledged an issue with the reset feature in Windows 11 Enterprise LTSC 2024 on April 9, 2026. If the hotfix KB5079420 from March 10, 2026 (and possibly also the hotfix KB5077212 from February 10, 2026) has been installed, there may be issues with the reset function in Windows 11 Enterprise LTSC 2024. However, the information available to me is somewhat confusing and incomplete. Read more details within my German blog post [use site`s build-in translation to show it in English etc.]

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Adobe Reader: Emergency patch for 0-day vulnerability CVE-2026-34621

Posted on 2026-04-12 by guenni

Sicherheit (Pexels, allgemeine Nutzung)[German]A few hours ago, I reported on a zero-day vulnerability in Adobe Reader. Simply opening a PDF file can be enough to take control of the system. Adobe has now confirmed the vulnerability (CVE-2026-34621) and released a security update to patch it. This should be installed within 72 hours.

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MC1269861: Deleted OneDrive files do not always go to the Recycle Bin

Posted on 2026-04-11 by guenni

[German]Another update from April 3, 2026, affecting Microsoft OneDrive users. On that date, Microsoft announced that starting in May 2026, files deleted from the OneDrive cloud will no longer appear in the local Recycle Bin. However, recovery via the OneDrive or SharePoint web Recycle Bin will still be possible.

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Malware: Website hosting CPUID, HWMonitor, CPU-Z, etc., hacked

Posted on 2026-04-10 by guenni

Stop - Pixabay[German]Warning to users who use tools such as CPUID, HWMonitor, CPU-Z, etc. and updated it recently (between April 9, and April 10, 2026. The website where these tools were hosted and offered for download has fallen victim to a supply chain attack. As a result, malware was/is being distributed via downloads from the web server. Therefore, anyone who has recently downloaded tools such as CPUID, HWMonitor, CPU-Z, etc., from this website may have malware on their Windows system.

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Microsoft 365: Semi-Annual Enterprise Channel (SAEC) is being discontinued

Posted on 2026-04-10 by guenni

[German]A quick note for administrators of Microsoft 365 installations who have placed their users in the Semi-Annual Enterprise Channel (SAEC). This channel will be merged with the Monthly Enterprise Channel (MEC). Users will therefore be subjected to the flood of updates from Redmond on a monthly basis going forward. And for new MS 365 tenants, the Semi-Annual Enterprise Channel (SAEC) is already no longer selectable in the Microsoft 365 Admin Center. Further details may be read within my German blog [use build in translation to read the text].

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