I just read about this over the internet.You can change the priority of applications as soon as associated IO tasks are completed. Microsoft TCP/IP Stack component AFD.SYS allows you to do this. You can read all about it at http://rdweb.cns.vt.edu/public/notes/tcpip2000.pdf Again this is a registry tweak and works well with XP.Open Registry by going to START-RUN and entering REGEDIT and Navigate to

[HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\AFD \\Parameters] and set the following key values to the values shown.

"TransmitWorker"=dword:00000010

"PriorityBoost"=dword:0000000a