Is somebody else having this problem?

Like 6 months ago I was playing as Healer on a RDF and then, out of nowhere, my keyboar stop responding (both of them. I use a notebook + USB keyboard). Fortunately I was using healbot and had no big problems.
But then, even if I unplug-plug my keyboard, it doesn't respond. The only way to make it work again is Rebooting the windows. Not a big deal, but since then, the same thing has happened like 6-7 times already and everytime this happened I was playing WoW...

I've taken some research and found nothing that fixes this... does anybody have a clue?