Windows update causes server to restart infinitely, Hyper-V cannot be started, and desktop cannot be connected to VPN | iThome

Patch Tuesday released by Microsoft this week, one of the updates caused Windows Server machines to keep restarting, Hyper-V could not be started, and the file system ReFS could not be accessed. In addition, the VPN service of Windows 10 and 11 desktop computers cannot be connected.

German blog Borncity reports , this month, the KB5009624 update for Windows 8.1 and Windows Server 2012 R2 was released. It was originally to solve the security problems caused by the improper design of Active Directory (AD) attributes in Windows Server when modifying LDAP parameters, but it caused problems as a network Domain controller Windows Server keeps rebooting troubles.

After installing this update, the native security authentication subsystem service (Lsass.exe) in Windows Server triggers an access violation error message, which further leads to Windows machines that are domain controllers. Keep restarting.

LSASS is an internal program of Windows that implements Windows system security policy. It is responsible for verifying user identity, managing user password changes, and keeping records when users log in to a single computer or server.This trip will cause the system to reboot when terminated

According to a Reddit forum user discussion , the affected versions may include Server 2012R2, Server 2016, Server 2019. Currently the only way is to remove the updated versions of these 3 platforms.

In addition to the restart problem,Many users reportedAfter installing the update, the VM running on Hyper-V will not boot.The latest update also causedThe data in the ReFS volume of the flexible file system in the user’s Windows Server has all become unreadable original data, and all server versions may be affected.

Microsoft’s official web page has not yet mentioned these issues.

At the same time,Many desktop Windows users complainAfter the update this month was installed, the VPN on Windows desktops was disabled, including the built-in L2TP VPN client of Windows 10 and Windows 11, and some third-party VPN applications such as Meraki. The faulty updates include KB5009543 and KB5008876 for Windows 10, and KB5009566 for Windows 11.

Microsoft only released a Windows Server exception patch last week, to resolve the issue that Windows Server Remote Desktop cannot connect, log in to services, or slow down or stop responding due to the KB5008218 update released in mid-December.

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