A Virtual machine monitor (VMM) is a piece of computer software, firmware or hardware that creates and runs virtual machines.
So you can run a different OS into your own computer just a great peace of software to try something else.
Virtual Box system emulator just to show how you can use this great software. I am using a Ubuntu 14.04 computer and i install Linux Mint 17.2 in a virtual machine.
System requirement :
- Reasonably powerful x86 hardwa
- Memory at least 2000 Gb of Ram
- Harddisk depending on guest system but a modern system needs minimal 5 GB of free space.
- A supported host operating system
A supported guest operating system.
The hardware requirements are dependent on what your host operating system and which operating system you want to install in the virtual machine. The safest way is to look at both minimum system requirements and then make choices how much processing power (cores) and memory (Ram and Video) you want to assign to the virtual machine.