I have had U-verse wifi internet for over a year without any incident. A couple of months ago I started experiencing WiFi issues. I had 5 devices connected via wifi and the problem affected them all.

2 XP Service Pack 3 PCs

1 Vista Ultimate 32 Laptop

1 XBox 360

1 HP Photosmart Printer

The problem is that the devices are unable to fully connect to the AT&T 2Wire WiFi.  On Vista the connection is listed as an Unidentified network with Limited Connectivity. The only way to resolve is to power off the U-verse router. This shuts down everything of course.

I called in support and 2 service techs came out and conducted some tests. They could not detect an issue but replaced the router. Within a week the problem resurfaced.

Any ideas?