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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Windows 11 25H2 Pro: Update KB5085516 is causing issues

Posted on 2026-04-09 by guenni

Windows[German]I received a report from a reader stating that the KB5085516 update for Windows 11 25H2 Pro is causing issues on the Windows desktop for this user. This affects how windows are displayed on the desktop, making it impossible to resize them or make other adjustments.  German blog readers has confirmed this behavior. Details may be found at my German article [use build-in translation to read the text].

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Veeam Backup Issue with MS 365 Mailboxes due to the EWS retirement in March 2026

Posted on 2026-04-08 by guenni

Bug[German]A quick note to blog readers who use Veeam Backup 365. Back in November 2025, there were already issues with the integration between Veeam Backup and Microsoft 365 mailboxes. Now, a reader has once again reported the Veeam Backup issue with Microsoft 365 mailboxes to me. This time, the EWS migration planned for Exchange Online starting at the end of 2026 has already cast its shadow. Microsoft rolled out its code change on March 27, 2026, which affects Veeam Backup and leads to errors.

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Outlook Classic: Email sending issue resolved

Posted on 2026-04-06 by guenni

There was an issue sending emails in Outlook Classic when using a mailbox on outlook.com. This caused the operation to trigger an NDR error 0x80070005-0x0004dc-0x000524. The issue has since been resolved. I have added this information to the German post Outlook Classic: E-Mail senden scheitert mit 0x80070005-0x0004dc-0x000524 [use build in translation to read the article in your language].

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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 ...

Microsoft is now pushing the Windows 11 25H2 upgrade

Posted on 2026-04-04 by guenni

Windows[German]Unmanaged systems running Windows 11 24H2 Home and Pro are now being gradually updated to Windows 11 25H2. Microsoft announced this on March 27, 2026. The reason for this move is that support for Windows 11 24H2 Home and Pro will end in October 2026.

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Windows 11 24H2 – 25H2: OOB Preview Update KB5086672 with issues (March 31, 2026)

Posted on 2026-04-01 by guenni

Windows[German]On March 31, 2026, Microsoft released the Preview Update KB5086672 as an out-of-band update for Windows 11 24H2–25H2. It is intended to resolve the issues caused by the withdrawn Windows 11 Preview Update KB5079391. However, based on the information I have received and reader comments, the new update appears to have additional issues.

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Windows 11 24H2 – 25H2: Rollout of Update KB5079391 suspended

Posted on 2026-03-30 by guenni

WindowsMicrosoft has suspended the rollout of the update package KB5079391, which was released on March 26, 2026, as a preview update for Windows 11 24H2–25H2. This update was intended to fix a long list of bugs and is scheduled to be included in the regular security update on April 14, 2024. Due to installation issues, the update has been temporarily withdrawn. Details may be read here [use build in translation to read the article in English].

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Vulnerability CVE-2026-3055 in Citrix NetScaler ADC and Gateway is being exploited

Posted on 2026-03-29 by guenni

Sicherheit (Pexels, allgemeine Nutzung)On March 24, 2026, I warned of two critical vulnerabilities in the Citrix products mentioned in the post Critical vulnerabilities in Citrix NetScaler ADC and Gateway (March 2026). Now attacks exploiting one of these vulnerabilities are being observed in the wild. Users should patch immediately—details are available in the article Kritische Schwachstellen in Citrix Netscaler ADC und Gateway (März 2026) [use build in translation to read the article in English].

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Windows 11 24H2 – 25H2: Preview Update KB5079391 (March 26, 2026)

Posted on 2026-03-27 by guenni

WindowsMicrosoft released the Preview Update KB5079391 for Windows 11 24H2–25H2 on March 25, 2026. They continue to work on fixes and improvements for various components (including a fix for the ERROR_BAD_PATHNAME update error) and update the AI bloatware. Here is an overview of the new features Microsoft has included in the Preview Update.

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