As I suspected, the Wubi install had actually completed fine. I booted it without issue. I also noticed that I had Microsoft Word running at the time of the install, so perhaps that makes a difference with this mysterious virtual drive. I'll test it again in the future to see if it happens only when office is running.
I still think it maybe doesn't need to look like a fatal error - especially if a successful bcdedit has already been received on a different drive.
As I suspected, the Wubi install had actually completed fine. I booted it without issue. I also noticed that I had Microsoft Word running at the time of the install, so perhaps that makes a difference with this mysterious virtual drive. I'll test it again in the future to see if it happens only when office is running.
I still think it maybe doesn't need to look like a fatal error - especially if a successful bcdedit has already been received on a different drive.