Ubuntu 15.04 Desktop on Hyper-V using Windows 10
Issue: “The image’s hash and certificate are not allowed (DB) .
Solution:
1) Disable “Secure Boot”
禁用安全引导(见下图)
2) Move up the DVD Drive in the Boot order
设置DVD驱动器为第一启动顺序
来自 <http://www.virtualrick.com/?p=230>