FYI - I had no trouble to install on a 25GB partition of my Toshiba laptop (it is on a 90GB SSD where space is at a premium). I did have trouble though installing it in Virtual Box on that same laptop whilst the vBox installation on my desktop went like a breeze. So it seems to be erratic.
Interesting. I'm also on a Toshiba laptop. I think I will try installing on my HDD.
If the installation didn't complete, none of the Windows 8 repair options will help right?
Also, (may be a really silly questions), but at what point do you actually remove the Windows 8 Installation disc from the computer and change your BIOS back to boot from HDD? I would assume not until you reach the Windows 8 desktop?