TCP retransmission

 You can increase this value with registry key TcpMaxDataRetransmissions

“This entry appears as MSS: (TcpMaxDataRetransmissions) How many times unacknowledged data is retransmitted (3 recommended, 5 is default) in the Local Group Policy Editor. This entry sets the maximum number of retransmissions of a TCP segment containing data before the connection is abandoned. The retransmission timeout is doubled with each successive retransmission on a connection. It is reset when responses resume. The base timeout value is dynamically determined by the measured round-trip time on the connection.”

You need to add this registry key

You can check more details in Microsoft online documentation:

http://technet.microsoft.com/en-us/library/dd349797%28v=ws.10%29.aspx#BKMK_4

http://support.microsoft.com/kb/170359