If you are connected to a LAN and have problems with jerky graphics, this might be the solution:
• Right-click “My Computer”.
• Select “Manage”.
• Click on “Device Manager”.
• Double-click on your NIC under “Network Adapters”.
• In the new window, select the “Advanced” tab.
• Select “Connection Type” and manually set the value of your NIC. (Not “Auto
Sense” which is default.).
• You should reboot.