When a client computer launches BootWorks to begin an imagining process, they hang at "Updating Client Record". Clients also do not stay connected or PXE Services fails.  The AxEngine log contains the following kinds of errors:

1696-OnWSANotify() called with an error of: WSAECONNABORTED

The source is the Service Control Manager, the Event ID: 7034 and the description is:
The Altiris PXE Services service terminated unexpectedly.

WSAECONNABORTED is a Microsoft error. If a Google search is performed, a number of hits will be found:

WSAECONNABORTED (10053) Software caused connection abort. The software caused a connection abort because there is no space on the socket's queue, and the socket cannot receive further connections.

WinSock description:  The error can occur when the local network system aborts a connection. This would occur if WinSock aborts an established connection after data retransmission fails (receiver never acknowledges data sent on a datastream socket).

TCP/IP scenario: A connection will timeout if the local system doesn't receive an (ACK)nowledgement for data sent. It would also timeout if a (FIN)ish TCP packet is not ACK'ed (and even if the FIN is ACK'ed, it will eventually timeout if a FIN is not returned).