Utility cant find the airport express, windows8

3 common causes when this occurs:

1) The Windows FireWall is blocking the connection attempt between AirPort Utility and the AirPort Express

2) The PC anti-virus software is doing the same thing

3) Microsoft Security Essentials....if installed...is doing the same thing

Check the settings in each application to see if a "block" is occuring, so you can make an "exception" or "allow" the connection to occur.

It might help to try a direct connection from an Ethernet port on the PC to a LAN <-> port on the AirPort Express. If you can configure the Express this way, you can disconnect the Ethernet cable once the Express has been set up.

Although primarily used for printer communications, it is a good idea to install Bonjour for Windows, as Bonjour may help communicatons on the network.

Bonjour Print Services for Windows v2.0.2 - Support - Apple

I'm having the same problems here. I've set up my Express via Ethernet but as soon as I disconnect the cable Airport Utility can't find it. HELP!