Are you running this on your PC?

I think you haven't configured Apache correctly, it doubt it should be saying localhost@localdomain either when you force a 404

Edit the http.conf file (should be a shortcut in the Start Menu if you install it correctly in Windows) and enter the correct address after ServerName rather than an IP address. Might be some other things you need to tweak in there too, so take a while to read the comments in that file and adjust anything you think needs adjusting, then restart Apache when you're done and saved the file