sebus, I only replied cause i thought it would save Gremo from wasting his or her time trying a powershell script that won't work on win7.
Thank for your time to all. I've build my vhd using imagex, than saved the old bcd configuration: Code: bcdedit /export C:\bcdbackup Using Windows 8 bootloader (X is the mounted vhd drive letter): Code: bcdboot X:\Windows All worked fine. Tested for more than an hour. After, you can uninstall it removing the vhd and issuing: Code: bcdedit /import C:\bcdbackup Anyway the question still remain unanswered