Failed to open a session for the virtual machine

[StuartSmith]

Failed to open a session for the virtual machine W7U-V-0001.

VT-x is not available (VERR_VMX_NO_VMX).

Result Code: E_FAIL (0x80004005) Component: ConsoleWrap Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

I have removed Hyper-V from my Windwos 10 64 Pro machine. I have uninstalled and re-installed Virtual Box. I made sure virtualization was enabled in the BIOS.

Any help is greatly appreciated!

[Socratis]

1. It's usually better and faster, if issues get first addressed in the ​VirtualBox forums, a lot more eyes there. More than 95% of the issues are resolved over there, which keeps the developers focusing on the bug fixes and enhancements, and there is no need for another ticket to keep track of. For example, yours is most probably not a bug and someone from the developers has to deal with it and close it as "Invalid".

2. You were supposed to follow these steps when you filed the bug, and provide a VBox.log:

   Attach a (full) log file ("Machine" menu/"Show Log" in the main VirtualBox Manager window) straight away to save time for you and for us. The log file contains a lot of useful information about both the host and the guest systems as well as information about what happened during a particular machine run. Please do not cut and paste it.

3. Please go thoroughly through the FAQ: ​I have a 64bit host, but can't install 64bit guests. Those are guidelines, you have to use your judgement...