If I initialize the MX100 main unit settings, I can't find the network on a Windows Vista (or later) PC.

This is a known issue with MX100 firmware release R3.01 and earlier, in which initializing the IP address results in failure of communication with PCs running Windows Vista or later. You can either use a Windows XP PC and set the IP address, or upgrade to a later release of the MX100 firmware (R3.02 or later). MX100 firmware download page *Log-in Required