I got an Hyper-v core box and I need to turn automatic restart on. How can I do that?
Windows – How to enable system restart on BSOD from commandline
bsodhyper-vwindowswindows-server-2003
Related Solutions
As a more general answer, not specifically aimed at your question, Microsoft has a support article which lists all old versions and the operating systems that provide each one.
IIS version Built-in
5.0 Windows 2000
5.1 Windows XP Pro
6.0 Windows Server 2003
7.0 Windows Vista and Windows Server 2008
7.5 Windows 7 and Windows Server 2008 R2
8.0 Windows 8 and Windows Server 2012
Current versions are on Wikipedia
8.5 Windows 8.1 and Windows Server 2012 R2
10.0 v1607 Windows Server 2016 and Windows 10.*
10.0 v1709 Windows Server 2016 v1709 and Windows 10.*
10.0 v1809 Windows Server 2019 and Windows 10.* October
There are several methods that allow you to mount a guest's Hyper-V VHD file in the host OS. In Server 2008 R2 (and Windows 7), you can actually mount a VHD file as an attached drive in Disk Manager. 
There are also third-party tools that allow you to open VHDs and edit the file systems inside of them. R1Soft makes a tool that's free, although registration is required.
Hope this helps!
Best Answer
The configuration is held in the following registry key:
With a setting of either 1 (AutoReboot on) or 0 (AutoReboot off)
The following command should enable it: