By Sergiu Gatlan
Publication Date: 2026-04-20 08:30:00
Microsoft has released out-of-band (OOB) updates to fix issues affecting Windows Server systems after installing the April 2026 security updates.
As Microsoft confirmed last week, some admins may experience failures when installing the KB5082063 security update on Windows Server 2025 devices.
Additionally, this month’s Patch Tuesday cumulative updates are causing some Windows servers with domain controller roles to enter a restart loop due to crashes of the Local Security Authority Subsystem Service (LSASS).
Microsoft also warned that this issue may also occur when setting up new domain controllers (or even on existing ones) if the server processes authentication requests very early during startup.
To address these two known issues, Microsoft has released emergency updates for the following affected Windows Server versions:
“The Windows Server 2025 OOB update (KB5091157) addresses both the installation failure issue and the domain controller restart issue,”