I download GenyMotion Android Emulator with Virtual VM pack. Everything worked out well till the Virtual device download process. The virtual device was downloaded successfu
I had the same problem (or at least the same symptoms). Try to start the VM directly from the Oracle VM Virtualbox (not via the Genymotion GUI). You should find the Virtualbox somewhere like "C:\Program Files\Oracle\VirtualBox\VirtualBox.exe"
When you start the virtual device that way, you get at least a more or less meaningful error message that you can google for solutions. In my case, I had to enable Virtualization in my BIOS and update VirtualBox to the latest version twice. After the first try there was something wrong with the kernel drivers. So I restarted the setup and clicked "Repair" to re-install the VM drivers.
Also don't save the machine state when you close the VM. It's safer to always do a cold boot. As soon as you can start the VM from the Oracle GUI, you should be able to so with Genymotion. Only by starting the VM with Genymotion the virtual device gets connected to ADB and therefore can be used with your IDE.