Posted 13 April 2011 - 05:38 PM
You don`t mention your OS but the instructions should be similar.
Go into the Network connections folder, right click on the icon representing the wired\LAN connection and select disable. To make things a bit easier you can have an icon for the wired connection placed in the Taskbar. Then it`s a simple matter of clicking on it to disable\enable it.
But, to access the files\folders after that you would temporarily need to re-enable it.
That is probably the simplest way. I would think others exist but involve a bit more and perhaps third party software.