Error when installing Ubuntu 20.04 in VirtualBox
I had this issue as well after I had enabed hyper-v on windows 10.
To fix it I, made sure I disabled hyper-v by doing the following.
- Open 'Turn Windows features on or off' (search for that in the start menu)
- Untick hyper-v, Windows hypervisior platform and virtual machine platform.
- Start the command prompt as an administrator. (type cmd in the start menu, right click 'command prompt' and select 'run as administrator')
- Run the following command
bcdedit /set hypervisorlaunchtype off
After a restart it seemed to install and work.
Credit to u/SquareVehicle on r/virtualbox who suggested the bcdedit command