PXE client computers freeze during multithread network transfers in Windows Server 2012 R2

Symptoms
When you deploy Windows Server 2012 R2 through Windows Deployment Services (WDS) Pre-Boot Execution Environment (PXE), the server CPU usage spikes to 100%. In this situation, client computers may freeze while waiting for a response from the PXE server. 
Cause
This issue occurs because of a race condition on the server that occurs in PXE operations that attempt multi-threaded network transfers. For example:
  • A high number of logical processors (32+ logical processors)
  • Multiple clients connect to a single PXE 
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.
Properties

Article ID: 3155444 - Last Review: 05/30/2016 03:34:00 - Revision: 2.0

Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation

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