Wireless Internet Quit Working

Hey everyone,
It’s been at least a day since I’ve had a problem. So goody, I’m back with more!
About 2 days ago my computer just quit recognizing the wireless signal from my wireless (g - just like the modem) router. The thing is, the other wireless computer in our house has no problem picking up the signal. So it’s obviously some problem with my computer. I have an internal wireless doo-dad, it just ceased to work out of no where.

If anyone has any idea where to start to fix this problem, please let me know.