TAKEN AT YOUR OWN RISK
Some machines suffer from jerky graphics or high CPU usage even when a machine is idle. A possible solution for this, which, can also can help network performance is to:
1. RightClick 'My Computer'
2. Select 'Manage'
3. Click on 'Device Manager'
4. DoubleClick your network adaptor under 'Network Adapters'
5. In the new window, select the 'Advanced' tab
6. Select 'Connection Type' and select the correct type for your card and then Reboot
