Go figure...

I'm using a Belkin wireless card on my laptop (WinXP) at home. I go out of
town (fly) and then my wireless doesn't work at all. I've tried shutting
down the firewall, virus scan, etc., but my wireless utility still doesn't
connect.

Here's the real kicker:

I took my laptop along with the wireless card to Best Buy to let the Geek
Squad check it out...they can't solve the problem! They card worked on their
spares laptops at that!

Can someone please tell me what the hell is going on? They only thing that
happened was that my laptop had to pass through the security x-ray at the
airport...HELP!