Vaak hebben laptops een knopje om snel de wifi uit te schakelen. Dit zal je snelste oplossing zijn :)
Minuutje google :
When more than one network connection is available, Windows uses the
one with the lowest metric value. By default, it automatically
assigns a metric value based on the network connection's rated speed:
An explanation of the Automatic Metric feature for Internet Protocol
routes
http://support.microsoft.com/?id=299540
To force Windows to use a specific network connection, assign a metric
value to each one, giving the lowest value to the desired connection:
1. Open the Network Connections folder.
2. Right click the desired connection.
3. Click Properties > Internet Protocol (TCP/IP).
4. Click Properties > Advanced.
5. Un-check "Automatic metric".
6. Enter a number between 1 and 9999 for the "Interface metric".
Stel je kabel verbinding dus gewoon in op 1, en je wifi op 2, probleem opgelost :)