Due to limitations with VboxManage since VirtualBox 6.1, it is highly recommended to run Genymotion Desktop in an admin account.
If this is not possible, and you get the errors "Unable to start a device" or "An error has occurred while trying to create a virtualbox host-only network interface", try the following:
- Log in to Windows with an admin account
- Open Windows Settings.
- Click on Network & Security.
- Delete any VirtualBox host-only ethernet adapaters
- Uninstall VirtualBox
- Download and install VirtualBox 6.1.30 or above host for windows at https://www.virtualbox.org/wiki/Downloads
- Reboot the PC
- Log in with the standard user account
- Run Genymotion
- Several UAC popups should display, it is mandatory to grant admin access to create the required host-only interfaces at this point.
- Create a new device (it is recommended to delete any existing devices) and try to launch it.
- This should fail with the usual error message ("Unable to start device").
- Reboot the PC, log in with the standard user account and try again.
If it still fails, follow these steps:
- Log in to Windows with an admin account
- Open VirtualBox and go to File > Host Network Manager...
- Delete all the excess VirtualBox host-only ethernet adapaters. There should be only one left.
- Reboot your PC and log in with the standard user account
- Run Genymotion