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When I run Genymotion, I get the following error:
Unable to start the Genymotion virtual device.
Unable to configure the network adapter for the virtual device.
Please, check the following points:
From VirtualBox, in the main parameters of software, check a network adapter "Host-only" is present. From VirtualBox, in the Genymotion virtual device parameters, check the first network interface has the type "Host-only". If no, then set this parameter manually.
How can I fix that?
Please download new Virtual Box and Install it.
For Download Virtual Box use below link:
https://www.virtualbox.org/wiki/Downloads
These works for me.
Also make sure to update your Oracle VM Virtual Box. I tried everything but later realized that the issue was due to the use of older version of Virtual Box.
I know this post is old, but in case someone is searching google i think i should mention what fixed my problem. After the 3 steps from above the error message was gone but the screen still stayed black and opening an .apk got stuck on file transfer. It had something to do with a VPN application (in my case Hamachi). I just closed it and then the emulator ran fine. This post prompted me to do so: https://groups.google.com/forum/#!searchin/genymotion-users/network/genymotion-users/QAX_UrAzEn0/o947IXpsDuIJ
This problem occured for me one time when I had already opened the built-in Android Emulator (AVD). Check if you turned off it before start changing anything in settings.
In my case, the only option was to remove the VM and download it again. No re-configuration of the host-only adapter did not help, I used different addressing of DHCP. Virtual Box I updated to version 4.3.4 and Genymotion to 2.0.2
Firewall might be the cause, just try disabling it In my case it was due to the firewall. I tried all these suggestions in the answers and none of them worked for me. Finally I disabled the firewall It worked for me.