Users report that the latest Windows 11 update, KB5039212, is causing serious problems, including boot loops and system crashes. Here's what we know.

Microsoft says it has resolved a Windows 11 bug that caused some commercial systems to fail to boot with an "UNMOUNTABLE_BOOT_VOLUME" error after installing recent security updates, with the fix ...

A few days ago, Microsoft released update KB5077181 for Windows 11 (both 24H2 and 25H2). Now, some reports (via Neowin) are emerging that the new version is causing boot problems for users. The ...

Windows KB5077181 reportedly causes boot loops, SENS login errors, and DHCP internet failures, but there's a workaround ...

KB5077181 is causing devices to restart over 15 times in an infinite loop. Users also report network issues and error codes.

Microsoft's latest Windows 11 update KB5077181 is wreaking havoc globally. Users face endless restart cycles, broken logins, and total internet loss. Microsoft advises uninstalling the update ...

In June 2025, Microsoft announced that, in June 2026, it would begin deprecating Secure Boot certificates of Windows systems ...

Secure Boot has relied on the same security certificates to verify bootloaders since 2011, during the development cycle for Windows 8. But those original certificates are set to expire in June and ...

Microsoft warns Secure Boot certificates will expire June 2026, updating PCs automatically to maintain boot-level security.

Refreshing new certificates represents one of the largest coordinated security maintenance efforts across the Windows ecosystem,' Microsoft explains.

Use these fixes if your Windows PC is stuck in a boot loop after a BIOS update. Before proceeding, disconnect all peripherals and check if your PC boots into Windows. Press and hold the power button ...

Microsoft is reminding users that the Secure Boot ecosystem will soon require a mandatory check-up. The Redmond-backed security protocol, part of the UEFI specification and primarily ...