Hi Here's what i have running. A 4 year old powerbook which always connects just fine to the internet, with no dropping of the signal. A new iMac with a airport extreme built in. It regularly just drops the internet connection, even though the internet is seen perfectly by the other maching. Router is a standard netgear router virgin media provide. Periodically, and some days it will be totally fine, but mostly on the weekends (like now) the signal on the imac just drops out (from perfect 4 bars, to none) and i lose access to the internet on this machine (very annoying when you are trying to talk to someone on skype!). after some time it reappears, only to drop out again. I have reset the modem to automatically select a wireless channel, but that seems to have done nothing. So following the advise on other chats here, i set the channel to 10. However the problem remains. I thought, well, maybe its the wireless phone, or the microwave, but these do not seem to affect the internet connection to the powerbook g4. The software updater for the "airport utility" claims it is up to date. And now i am totally lost as to what to do! Any sugestions?