Now you need to open VirtualBox and create a new virtual machine. Click on New:
Fill the following fields:
You can create a new virtual hard drive, or use existing one. For new virtual hard drive, I would recommend a minimum of 4GB for storage space.
Once you have created the virtual machine, select it from the list and click the “Settings” button.
Once you are ready, click the Start button. This will boot up the virtual machine.
On the boot screen, use the arrow key to select “Installation – Install Android -x86 to hard disk”. (If you just want to test it out, select “Run Android -x86 without installation”)
Select the “Bootable” option to make the partition bootable. Next, select “Write” and press Enter. Type “Yes” when prompted. Lastly, select “Quit” to quit the cfdisk (Partition manager).
Back to the main screen, select the partition that you have just created and click OK.