Install 13.10 on Windows 8.1 - No Good

Have an HP Pavilion, Windows 8.1, 2Tb machine. Tried installing 13.10 using wubi. Install seems to work. When it restarts and gets to the OS Selection, I select Ubuntu. Screen goes black then comes up with an error dialog. Along with other dribble, this is what I get.

\ubuntu\winboot\wubildr.mbr
Status oxcooooo7b
Required file is missing or contains errors

I even tried to install 12.04.3 but got the same messages.

Bottom line, I want to install Ubuntu and replace Windows 8.

Thanks,
Rich Ramik