The VirtualBox DHCP server has not assigned an IP address to the virtual device

This error means that VirtualBox DHCP server took too long, or failed, to assign an IP address to the device. It is usually caused by the following.

I. You are using Windows

1. Disable Hyper-V

Hyper-V deos not work well with Genymotion and VirtualBox hypervisor. We recommend turning it off when running Genymotion. Please, follow the instructions from this article: How to disable Hyper-V.

2. Disable Memory Integrity

Windows Memory Integrity security features enforces Hyper-V, even if it has been disabled in Windows features. You need to disable this feature to make sure VirtualBox has access to VT-X/SVM hardware virtualization:

• Open Windows Security
• Go to Device Security > Core isolation details
• Turn Memory Integrity off

3. Set Power management to Performance

This error can be caused because VirtualBox took too long to allocate an IP to the device. On Laptops and Notebooks, this may happen if you are in "Save Battery" power mode. To avoid this, make sure to set your power mode to "Performance" and plug the AC power in.

Please note that virtualisation is CPU-intensive and may drain your battery.

4. If you have a laptop with discrete GPU

Some laptops have a discrete NIVIDIA or AMD GPU alongside an Intel iGPU. This type of hardware is known to cause issues on Windows systems.

To fix this, you need to force Genymotion to use the discrete, high-profile GPU. See How to force Genymotion Desktop use the high performance discrete GPU on laptops?

5. If you have recently updated Windows

This error may occur after a Windows update. To fix it, remove and re-install VirtualBox:

1. Uninstall VirtualBox
2. Reboot your PC
3. Download VirtualBox recommended version installer for Windows. See  VirtualBox recommended versions
4. Re-install VirtualBox
5. Reboot your PC
6. Launch Genymotion and start a device.

If an error occurs, reboot your PC and try launching Genymotion Desktop again.

II. Other

You are trying to run Genymotion Desktop in a virtual machine

Genymotion Desktop has been designed to run in a physical environment, not in a virtual machine. For this reason, Genymotion Desktop will not work if run in a Windows, Linux or macOS VM.

For more details, please refer to Can Genymotion Desktop run in a virtual machine?

VPN and Firewalls

VPN and Firewalls may interfere with VirtualBox. See:

• Genymotion Desktop and VPN
• Genymotion Desktop and firewalls

Hardware requirements

This error may occur on hardware which does not meet Genymotion Desktop requirements.

The virtual device is using too many CPUs

You cannot use all your CPU cores when running a virtual device: you need at least to preserve 1 for your operating system.

For example, if your CPU has only 8 cores, you need to reduce the number of Processors of the virtual device to 7 or less.