Microsoft’s first Windows 11 security update of 2026 broke shutdowns and some Remote Desktop sign-ins. Microsoft has released emergency out-of-band fixes via Windows Update, including KB5077744 and KB5077797.

Windows 11 had a rough 2025. We tracked the top 20 Windows 11 issues reported by Windows Latest, from failed updates to broken features.

Microsoft’s latest Windows 11 security update was meant to harden PCs against stealthy firmware attacks. Instead, it has triggered a fresh headache: some systems now refuse to power off properly, looping back to the desktop instead of shutting down.

Microsoft’s first major Windows 11 update of 2026 quickly turned into a headache for users, after widespread reports emerged of systems failing to shut down properly and remote sign-in tools suddenly becoming unusable.