June 14, 2021

Microsoft’s Patch Tuesday Kernel-Mode driver update causing problems

stop-_c000021a(LiveHacking.Com) – Last Tuesday Microsoft released nine security bulletins to address 14 different vulnerabilities in its products including one to fix vulnerabilities in Windows’ Kernel-Mode Driver that could allow an attacker to gain elevated privileges. Following the released of the patches reports started to appear about Windows 7 systems that fail to recover from a reboot (as they just keep rebooting) or applications (specifically from Kaspersky) that fails after the security update is applied. Microsoft recommends that customers uninstall this update and it has removed the download links to the update while it investigates.

According to a Microsoft knowledge base article the symptoms are either you receive an Event ID 55 or a 0xc000021a Stop error during the boot process. The Event ID 55 will wrongly claim that file system structure on the disk is corrupt and unusable and force the run of the Chkdsk utility. The Stop error will simply say that the Session Manager Initialization system process terminated unexpectedly and the system will shutdown. Any attempt to reboot will likely results in the same stop code.

According to Microsoft, systems with the update applied that use Kaspersky Anti-Virus for Windows Workstations or Kaspersky Anti-Virus for Windows Servers versions and may display an error message saying that the license for the product is not valid.

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