it's a rare problem.
You can disable the card - go to Control panel and click on the system icon. Then click on the Hardware tab and on the Device manager button. Look for your PCI card - it will be under network adapters - and double click on it. Now look at the 'Device useage' box at the bottom, and select 'Do not use this device - disable' option. Reverse the procedure to enable the card.
This all seems like a lot of effort to resolve the problem - have you tried selecting a different channel on your wireless phone's base station?