VirtualBox Windows 10 64 Bit Host - The VM session was aborted
Maybe it will help. I turned off sound card , and at virtual machine I had "audio" controller turned on. When I turned off audio controler virtual machine start normaly.
BR Simon
Backed up the last saved snapshot from C:\Users\\VirtualBox VMs\Ubuntu\Snapshots
Go to Machine> Ignore last saved state.
Restart VM.
This worked.
This issue most likely happened for me because my Windows 10 randomly restarted a couple of time, with BSOD.
Error code
Result Code: E_FAIL (0x80004005)
Component: SessionMachine
Interface: ISession {7844aa05-b02e-4cdd-a04f-ade4a762e6b7}
I have the same issue, and hopefully there will be a bug-fix for it soon.
In the meantime, I have managed to start the install process (in my case for Linux mint 17.2 rather than windows) by attaching the .iso image in the VirtualBox IDE Storage Settings page rather than the "mount" dialog that causes the error.
Open the settings for your VM in the VirtualBox UI, go to Storage, click on the "empty" entry in the list of IDE Controllers, and select the disk icon over to the right of the screen. Finally, select to "Choose Virtual Optical Disk File", and select your .iso of choice. Then start the VM and it should boot just fine.
I hope it helps for your case too!
update the extension pack was my solution