i am not overly clued up on these things but all of a sudden one day my wireless broadband was not working. Had a lengthy call with a callcentre unplugging etc etc still nothing. Then told me to check a button on the right hand side of my laptop - little button on the side and that is what it was. I must have in advertantly pressed it so was not allowing wireless function. Sorry dont know technical name for this. It is just down from where I input a cd which I imagine will be the same on most.