Counter-Strike 1.6 disconnecting

Hello im new to the fourm

i just installed windows Ultimate x64 was running with xp pro b4.

oki heres the deal, i've been playing CS 1.6 for along time and now with vista
i get disconnected every 5-10min, im getting really pissed!

Im connected to my router by cable ( 4mb ADSL )
my computer info
intel(R) Core(TM) i7 CPU 920 @ 2.67GHZ
Memory 6GB
Graphics NVIDIA GeForce GTX 285

anyone got any idea's?

I turned off UAC and it seems to work now..