Tplayer,
1. Go to Start > Run... > type 'regedit' > OK
2. See if you find HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Psched
3. If you find it, set NonBestEffortLimit to the value '0' if you want to set to 0.
The QoS Service have to be running.
You could also have a look here: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Psched\Parameters\Adapters
You have to go through all your network adapters, though.
As for another note, I am most certainly sure this is not available for you.