i have recently set up sky broadband how can i get my laptop to be wireless i have seen some types of plug in usb adaptors called bluetooth or network adaptors are these what i need
That assumes that your laptop doesn't already have wireless capability (most made in the past year or so tend to already). Also, that's a cardbus device, not for USB: they're better for this sort of thing.
Does the wireless card have to fitted by someone or can you just put it in yourself?
I was looking at the USB plug in adapters but my friend has the netgear one and for some reason it disables the ability to switch between user accounts on windows