10.0.2 in "Developer" mode: Windows 8.1 goes into "repair" mode...

Hello, I have a Mac OX mavericks i7 8Gb machine.

I am testing the free Parallels 10.0.2 (I have fusion but looking for alternatives). My virtual machine is a bootcamp Windows 8.1. 1 Gb, 2 CPUs.

If I run the bootcamp VM with "developer" configuration, the virtual machine says it cannot start and needs repairing and asks for the original disk if I want to actually "refresh" it.

if I go back to "productivity" configuration, the vm starts. Of course, If I boot the Mac in bootcamp, the bootcamp partition is OK.

I AM a developer. Any suggestions are welcome!

Riccardo