I installed a wireless-G network using a Linksys router and wireless card. After I installed the card, the computer completely failed to reboot -- it was unusable with the card in. The tech support people suggested some time-consuming, expensive, and useless fixes (which fortunately I didn't waste time or money on, as the computer was old). They didn't suggest that it might be a problem with the card itself, but I later installed in on 2 much newer computers (2 different brands with 2 different operating systems) and it crashed both of them in the identical way. I then bought a card from a different maker (Belkin) and it works flawlessly with my Linksys router. By the way, I love my wireless network, but there's definitely a learning curve.