[ubuntu] Error on 13.04 installation?

Toshiba Satellite C855

So I tried totally wiping my hard drive and installing 13.04 over my 12.04 LTS, everything went fairly smoothly until soon after I clicked the final installation button.

I get the error "The installer encountered an unrecoverable error. A desktop session will now be run so that you may investigate the problem or try installing again."

So, what do?