Every time Genymotion Desktop is launched, it calls VirtualBox to verify the availability of at least one VirtualBox Host-Only Ethernet Adapter. If none is available or compatible, it tries to create a new one and repeats the verification process.
Unfortunately, this operation sometimes fails on Windows. To solve this, try the workarounds below.
1. Reboot your PC
Rebooting your PC after having launched Genymotion Desktop for the first time often fixes this error.
2. Reinstall VirtualBox
If rebooting your PC does not help, you can first try to re-install VirtualBox:
- Remove VirtualBox from Windows..
- Reboot your PC.
- Download VirtualBox recommended version installer - see VirtualBox recommended versions.
- Re-install VirtualBox.
- Launch Genymotion Desktop. Do not launch a device yet or you will get an error!
- Reboot your PC.
- Launch Genymotion and start a device.
If none of the above worked, please refer to Windows/VirtualBox - An error has occurred while trying to create a virtualbox host-only network interface for other possible solutions.