install android 4.2 or android 4.3 on Computer follow below steps
- Open Virtualbox and Select New from menu, Enter credentials and select ->Type : Linux,Version : Other Linux
- Click next and enter minimum 1 GB space on RAM, 1GB space for hard disk (either dynamic allocation or fixed) and click next.
- Now goto Virtual Device and select setting a box will appear now
goto Storage->Storage Tree->Empty and in the attribute section on
the right side select android 4.2 or 4.3 iso you have downloaded, and check Live CD/DVD and click ok.
- Start Virtual Machine and Select Android-x86 on Hard Disk, next screen create/modify partitions.
- Create New bootable partition and select write and select quit after writing.
- Now install android 4.x on sda1 , type as ext3 and install grub.
- Remove ISO from VirtualBox and reboot Virtual Box.
- Now you can boot to android operating system.
sumber : http://www.androidgalaxy.org/install-android-os-computer-pc-windows-mac-linux/