When your begins booting, press F8 and enter -v at the boot prompt to find out any issues that might go wrong.Then just choose OK and press Start button to launch your VM. Then you will need to add the OSX86 iso you have already downloaded. Now select a special folder with the green arrow.Then choose Add at the top of the Window, as shown above. Now choose “Storage”, located in the left panel, and choose “Empty.Then you will need to uncheck the option for “Enable EFI (special OSes only)” as on the screenshot below. Create a new hard disk for your virtual machine that will be approx.Name your vertical machine as “OSX” and choose “Mac OS X” from OS menu, and “Mac OS X Server” from Version menu.A special wizard will be started to help you to set up everything proplerly.
You will need to have a system with an Intel/AMD processor that is able to support hardware virtualization, VirtualBox, OSX86 iso, and Windows OS used as host operating system.
Below you can find a detailed manual on how install Mac OS X Snow Leopard on VirtualBox without any difficulties. You can freely install any OS on your machine without any interruption from your current OS.
VirtualBox is a world-famous application that offers its users plenty of advanced tools for effective customization. How to install Snow Leopard on VirtualBox 4
