Hi
dont know if it same error as mine has gone away but sound like same problem, so i check my firewall settings (vista) as i had firewall turned off.
Now i click on "turn firewall on/off " and got windows message saying service is not running do you want to turn it on, i click yes and firewall options to turn on/off opened then i was able to install with nps
b4 this checking the firewall exceptions on or off didnt make any diff, still got same error but above fixed it
if you need any more details, ss pm me
thanks for mediaportal
FUBAR
EDIT
this is the error message
any the window for firewall

error meassge
mp.txt