Assume that a domain consists of Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7 Service Pack 1 (SP1), and Windows Server 2008 R2 SP1. An event subscription manager list that is configured by using Group Policy Objects (GPOs) has more than 30 items. In this situation, a deadlock may occur in the thread pool for the Svchost.exe process that hosts network services. This causes other threads that are related to the Svchost.exe process to wait. Therefore, the domain controller freezes.
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