>What is the best (i.e. easiest – one click if possible and just as quick and easy to reverse) method of >disabling my wi-fi Internet connection for the duration of a recording session?

You can display a LAN connection icon in the tray (area in the right of your taskbar, under the time, if you are displaying it). The icon is two PCs which flash when network activity is taking place. To show it, select Start/Settings/Network and Dial-Up Connections/Local Area Connection, right click and select Properties, then select "Show icon in taskbar when connected."

Once there, just right click on it and select "Disable" to disconnect.

To re-enable, select Start/Settings/Network and Dial-Up Connections/Local Area Connection, right click again and select "Enable". If you don't see this particular path, just go to Control Panel and do the same thing. (Hey, Microsoft: It'd be really nice if you'd leave the LAN icon in the tray when disabled; however, it just disappears. Oh, well.)

"My primary musical instrument is the personal computer."