The Cure for Boredom is Curiosity.

I had to replace the Airport Extreme that I bought with my G4 iMac in 2004. This also meant that I had to upgrade the OS. Everything works fine connecting wirelessly to the internet from the Mac, printing from the Mac, etc. No problems, until the PC operating on Windows Vista comes into the house and tries to connect into the network. It will connect for about 2 minutes then it takes everything offline - Airport doesn't communicate to the modem, the Mac can't see the Airport or if it does see the Airport the Mac reports the Airport as being "out of range". We spent about 2 hours on the phone with Apple Support trying to fix this, but nothing worked. The longest connection was taking the security off the Airport (not a good option). However that gave us an extra 2 minutes of connection time. Tried changing channels, moved the airport around the room, removed the phone from the room to see if that was causing the problem, Ronette turned off her exchange server connection, you name it I think we've tried just about everything. And the Apple support tech was a bit floored that he didn't have a simple answer. Ronette is going to update wireless drivers on her computer and we'll test all the options again. However, if anyone else has seen this problem or has a potential solution that we haven't hit upon yet. I figured I'd ask around before I have to go through an Apple tech having me reset the Airport for the 100th time.