For months, there have been rumors about Windows 11 26H1 in the media. The designation 26H1 indicates that this version of Windows 11 will be released in the first half of 2026. However, it was also clear (at least to me) that this Windows 11 only for ARM devices. Read more here [use translation]
Microsoft released the "February 2026" security update for Exchange Server on February 10, 2026. The security update applies to Exchange Server 2016, Exchange Server 2019, and Exchange Server Subscription Edition (SE). Exchange Online customers are already protected and are not affected by the update. Read more here [use translation]
On February 10, 2026 (the second Tuesday of the month, Microsoft's patch day), various cumulative updates were released for the supported versions of Windows Server. Below, I have listed the updates provided, along with some details for these Windows Server versions (from Windows Server 2012 to /R2). Read more here [use translation]
On February 10, 2026 (the second Tuesday of the month, Microsoft's patch day), Microsoft released cumulative updates for the still-supported client operating system versions of Windows 10 (with ESU license) and Windows 11. Here are some details about these updates, which fix vulnerabilities and issues. Read more here [use translate feature]
On February 10, 2026, Microsoft released security updates for Windows clients and servers, Office, and other products. The security updates address 54 vulnerabilities (CVEs), eight of which are critical, six of which were classified as zero-day vulnerabilities, and one of which is being exploited. Read more heree [use translate feature]
[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 ...
At the moment, Europe is desperately searching for alternatives to US software. LibreOffice is often mentioned as an alternative to Microsoft Office. Here in the blog, I keep hearing "There is no alternative to Microsoft Office because only their applications allow documents to be exchanged while retaining their formatting." Read more heree [use translate feature]
I would like to highlight a topic in this article that already dominated the headlines last week. Microsoft CEO Satya Nadella has appointed a quality and security officer. He hopes this will resolve the issues caused by the dismissal of testers in … Read more here [use translate feature]
Sponsored post – OST file – a cached copy of your mailbox items – is automatically generated when you configure Outlook profile with Exchange Server, Microsoft 365, or IMAP account. At times, situations arise when you need to open the OST file in another account, or migrate it to another Outlook, or take a backup. In such situations, you need to convert the OST file into PST format, which is easily accessed/imported into any Outlook profile.
Microsoft Office 2016 to 2024 and Office 365 apps contain a zero-day vulnerability (CVE-2026-21509) that is being actively exploited in attacks. On January 26, 2026, Microsoft published initial information (also about mitigations) and emergency updates for Microsoft Office.
The security updates for Windows released on January 13, 2026 are causing major problems, and Microsoft has had to release corrective updates. In the case of crashes in apps and Outlook Classic, uninstallation was even recommended. This is unfortunate for users of Windows 11 24H2/25H2 if the uninstallation fails with error code 0x800f0905. I've discussed the details in this article [use the translate option in the side bar of my German blog to read the article in English or other languages].
MVP:
2013 – 2016
WIMVP:
2017 – 2020
