
Microsoft rolls out emergency fixes to stabilize Windows Server after April patches
Microsoft released emergency out-of-band updates to fix issues caused by April 2026 Windows Server patches, including installation failures on Windows Server 2025 (KB5091157) and LSASS-related domain controller restart loops across multiple server versions; additional KBs cover Windows Server 2025 23H2, 2022, 2019, 2016 and Azure Edition hotpatches. Some Server 2025 devices may boot to BitLocker recovery after KB5082063. Other emergency fixes in recent months addressed Bluetooth visibility, RRAS, and sign-in issues.

