Morning Valerio!
Don’t know if you’ve already tried these steps though I’ve gathered from 5.2 documentation it’s quite the same for 4.14 (http://docs.opennebula.org/4.14/user/virtual_machine_setup/windows_context.html)
- Contextualization in Windows requires that two files are present in C:/
- You’ve to do some changes in your local group policy.
This post also looks useful for troubleshooting.
Cheers!