[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 It is intended to resolve the issues caused by the withdrawn Windows 11 Preview Update KB5079391.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.
Microsoft 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 Due to installation issues, the update has been temporarily withdrawn.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].
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].
Microsoft 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.
[German]There is an issue with Outlook Classic where the client crashes on startup due to a faulty Microsoft Teams Meeting add-in. As far as I know, Microsoft is still investigating this problem. Below, I have compiled some workarounds for those affected so that Outlook Classic can be used again.
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[German]Microsoft has already released a hotfix update on March 23, 2026, for users of Windows 11 Enterprise LTSC 2024. This update is intended to resolve sign-in issues with Microsoft accounts caused by update KB5079473 from March 10, 2026. It is likely the hotfix counterpart to the out-of-band update KB5085516.
[German]Citrix has issued a warning about several security vulnerabilities classified as critical in its Citrix Gateway and Citrix Netscaler ADC. CERT Bund has also published a corresponding advisory. Citrix has released firmware updates to address these vulnerabilities.
[German]A quick note for Google Chrome users. On March 23, 2026, Google released a new version of Chrome (146.0.7680.164/165) that addresses eight vulnerabilities in the browser. They are rated as high. It feels like the browser has to be updated every two days due to vulnerabilities, and Google plans to increase the frequency soon.
[German]Users of Microsoft Teams (Free version) and other Microsoft apps (Word, Excel, etc.) have encountered sign-in issues on Windows 11 24H2–25H2 after installing update KB5079473 from March 10, 2026. On March 21, 2026, Microsoft released the out-of-band update KB5085516 to resolve these issues.
[German]The Windchill and ZeroPLM software systems contain critical vulnerabilities (CVS Index 10.0) that companies using these products should have been aware of since the weekend. These vulnerabilities have prompted various German state criminal investigation offices to send police officers to visit system administrators, a inform them to take action (a move that has caused quite a stir).
MVP:
2013 – 2016
WIMVP:
2017 – 2020
