How I solved my “Failed to change states” error:
My situation: I had backups of my VHDX and 5 AVHDX checkpoints.
I clicked on and deleted the checkpoints INSIDE the Hyper-V console. (I do not...

How can I fix this. I have excellent backups. Is there something I need to restore besides the VHDX? Can I delete the AVHDX files? Thanks

I am running my Hyper-V host on a Windows 10...

OK. I may annoy some people with this comment, but .... feel free to delete it if it is bothersome.
I feel the poster had a good complaint - no boot password.
And I feel one of the responders...

Thank you for trying to help me.
Let me clarify:
1. My problem is fixed.
2. My (likely) culprit was BCVE.

Note: I was using BestCrypt VOLUME Encryption (BCVE). You are using BestCrypt...

I suffered for a long time from this dastardly problem. Every day Microsoft would assault me with aggressive "I'm gonna reboot" etc. And every morning I would start my day with a rebooted computer....

I've given up on this for now.
Doesn't seem to work.
I will see what I can learn by visiting the site where it does work.

In Default programs -> Set Associations, the current default for VHD (Virtual Hard Disk) programs is "Unknown application".
Could that be the problem? What approach can I take to fix it?

Well. I marked this thread "Closed" just assuming it would work.
And it didn't work. So I must have done sumthin dumb.
The behavior after updating the registry is identical to the behavior...

Thanks.
BTW - and for other members:
This is a brand new installation of Windows 10. I never messed with these Context Menus.
This suggests to me that the default is NO MOUNT.
However, my...

Yesterday I was on my client's Windows 10 PC.
In Explorer, I selected a .VHD file, call it MyVirtualDisk.VHD.
And ... a "Disc Image Tools" thing popped up at the top. I then right-clicked and saw...