I upgraded from Fedora 17 to 18 using the fedup package, or at least attempted to. There were no errors in the terminal when I ran the command, then rebooted and selected the "System Upgrade" option from grub as the wiki says.
This screen (mine said 18, not 13!) came up and after completing it waited like that for about a couple of hours, finally I'd had enough so I just reset my machine (probably a bad move).
Now there's an option on grub to load "Fedora 18", with "System Upgrade" and the regular items below it. But when I try to load Fedora 18 booting up stops at this screen (but black rather than blue). From here I can press Pause/Break, Insert, Delete or Home and get to a full screen terminal that says "Welcome to Spherical Cow", or similar, but I can't actually do anything from that window.
When trying to boot into any previous version (Fedora 17 with previous kernals) from grub (only keeps 2 previous versions), it will hang just before the log in screen comes up. From here I can't enter any terminal windows with Alt + F2, etc. So again can't do anything I've seen recommended via the terminal. This is what is displayed on my screen:
I've never had problems with preupgrade before, so assumed fedup would work in a similar way. Is there anything you can recommend to get this working again, or would a complete reinstall be best?