microsoft
Windows 11 KB5089573 update released with performance improvements
Microsoft has released the KB5089573 preview cumulative update for Windows 11 versions 25H2 and 24H2, which comes with 30 changes, including performance and reliability improvements. The KB5089573 update is part of the company’s non-security preview schedule, designed to introduce new features and fixes at the end of each month, allowing IT admins and users to test them […]
Microsoft Defender can now automatically isolate hacked endpoints
Microsoft is testing a new Defender for Endpoint capability that will automatically isolate compromised endpoints to thwart attackers’ attempts to move laterally across the network. This is now available in preview mode and works as part of automatic attack disruption, a feature designed to contain attacks, limit their impact, and provide security teams with more remediation time. […]
Microsoft: Domain Controller lookup may fail on Windows Server 2016
Microsoft has confirmed a new known issue affecting Windows Server 2016 systems that causes domain controller lookups to fail after installing the KB5087537 May 2026 security update. Windows Server 2016 reached the end of mainstream support in January 2022, but Microsoft has pushed back the extended support end date by 5 years to allow customers to […]
Cybercrime service disrupted for abusing Microsoft platform to sign malware
Microsoft says it has disrupted a malware-signing-as-a-service (MSaaS) operation that abused the company’s Artifact Signing service to generate fraudulent code-signing certificates used by ransomware gangs and other cybercriminals. According to a report published today by Microsoft Threat Intelligence, the threat actor tracked as Fox Tempest used the Microsoft Artifact Signing platform to create short-lived certificates […]
Microsoft shares mitigation for YellowKey Windows zero-day
Microsoft has shared mitigations for YellowKey, a recently disclosed Windows BitLocker zero-day vulnerability that grants access to protected drives. The security flaw was disclosed last week by an anonymous security researcher known as ‘Nightmare Eclipse,’ who described it as a backdoor and published a proof-of-concept (PoC) exploit. Nightmare Eclipse said that exploiting this zero-day involves placing specially […]
Microsoft plans to improve Windows 11 driver quality in 2026
Microsoft plans to raise the quality bar of Windows 11 drivers, as drivers “sit at the heart of every Windows experience” and connect the OS to the “silicon, components, and peripherals.” Before Microsoft shipped Windows 11, it frequently hosted WinHEC (Windows Hardware Engineering Conference), where Microsoft’s developers and OEM partners met to work on quality. […]
Microsoft blames macOS update for undismissible Teams location prompts
Microsoft has confirmed user reports that the Teams team collaboration app is displaying non-dismissible location prompts on some macOS systems. According to affected Teams users, these non-dismissible prompts have been appearing on Mac devices running macOS versions 14 (Sonoma), 15 (Sequoia), and 26 (Tahoe) over the past week, asking for permission to use their location “for things […]
Microsoft confirms patching issues in restricted Windows networks
Microsoft says customers in restricted network environments may encounter Windows Update failures after installing the January 2026 optional non-security preview updates. In Windows network-restricted environments, ranging from fully isolated, air-gapped systems to strictly firewalled networks, affected systems will display error code 0x80010002 when updating through Windows Update. “Affected devices might be able to download the […]
Microsoft testing adjustable taskbar, Start menu in Windows 11
Microsoft has finally brought back the resizable taskbar and Start menu to Windows 11 in the latest preview version rolling out to Insiders in the Experimental channel. Starting with Windows 11 Insider Preview Build 26300.8493, the taskbar can now be configured to use smaller buttons and moved to the bottom, top, left, or right side of […]
Microsoft confirms Windows 11 security update install issues
Microsoft has confirmed that the May 2026 Windows 11 security update (KB5089549) fails to install on some systems and triggers 0x800f0922 errors. This known issue is caused by insufficient free space on the EFI System Partition (ESP), which results in the update automatically rolling back on affected devices. “This issue affects devices with limited free […]