You should not need to disable it in Windows Vista, that probably won't help anything.
What brand is the wireless card? There's a good chance that it needs a proprietary driver that SUSE doesn't install by default. You might already know this, but setting up the card and drivers on vista affects linux in no way, positive or negative. you have to do a completely separate setup for OpenSUSE.
It would be easier to help if we knew some details of the card. What is the output of lspci in SUSE?