To connect to a defaulted unit you must first make sure the computer you are using is on the 192.168.168.0/255.255.255.0 network.
In Windows this can be done via the Control Panel>Networking>Parameters option. Once on the correct network you should be able to ping the device.
Start>Run> cmd>ping 192.168.168.254
If you can not you are still not on the correct network or the device is not properly attached to the network.
Once pingable, open a web browser and enter the following as the URL: