Comment 5 for bug 771517

Erick, the first install failed because Wubi was still partially installed. You then uninstalled and I think reran Wubi by hand. We speculate that the reason wubi.exe was deleted earlier than we were intending (because we were expecting it only to be scheduled for deletion later) is because of this.

Could you please try uninstalling Wubi in the Windows control panel, *then* rebooting into the Ubuntu installer such that it prompts you to use Wubi, and see if that works?