Slow RDP refresh

A great read...

http://blog.tmcnet.com/blog/tom-keating/microsoft/remote-desktop-slow-problem-solved.asp

This command seems to help:

netsh interface tcp set global autotuninglevel=highlyrestricted

netsh interface ip set global taskoffload=disabled

Symantec Endpoint server firewall rules

netsh firewall add portopening TCP 8443 "Symantec server port"
netsh firewall add portopening TCP 9090 "Symantec management console port"
netsh firewall add portopening TCP 8014 "Symantec client communication port"