It can be turned on and off; I've done that in the past. I'm currently using the software which came with my belkin wifi card to control connections, but with that one I can also easily switch control back to windows. (problem is my built in wifi chip went bad and crashes/freezes windows constantly, so I uninstalled it and I'm steering clear of the windows software too; I don't trust it).

I don't want to turn the access IBM stuff back on, so I can't find the switch for you. Sorry.