8.0 -> 8.1: EBDA error

Hi! When I tried to upgrade my laptop from 8.0 to 8.1, it took ages, sort of bocked - but lots of disk activity at around 82% after 6 hours ...!! I aborted the installation. There was a report of 600 modules in error. I then rebooted ... Lilo screen, launch Linux ... an EBDA error message appeared (EBDA too big or something like this). I knew I had very little space left on my hard disk. It could be the problem. Anyway, I am now back to Win XP :-(( or MAc OS X on the desktop :-) How can I recover my 8.0 system? TIA -- Lao Toma