I installed the package of GENYMOTION for windows(7) from their official web. It installed me the Oracle VM VirtualBox and the Genymotion. After that I opened the VirtualBox
I solved it!! As it says in their FAQ:
When you start a virtual device, you got an error about OpenGL initialization. This is probably due to an outdated video driver, or a very old video chipset. Try to update your graphic card driver using the latest version provided by your manufacturer (available on their website).