I removed the ethernet adapter immediately the installation failed (and restrained myself from destroying same), along with all associated software.
The 'Network not complete' info bax comes up if I click on 'Properties' for any of the installes protocols when in the Control Panel/Network box. It seeme not to matter whether I click 'Yes' or 'No'! Nothing seems to change either way. Incidentally, when I tried this last night, I didn't get that 'Network not Complete' box. Still can't get the computer to talk to any online servers though.