If you are a Windows Vista user and suppose you want to work in a windows XP environment, what will you do? Formatting of a computer is a very bad idea, so how can you use your computer to run any other operating system on present operating system.

This can be possible by the use of

Virtualbox which runs on Windows, Linux, Macintosh and OpenSolaris hosts and supports a large number of guest operating systems including but not limited to Windows (NT 4.0, 2000, XP, Server 2003, Vista), DOS/Windows 3.x, Linux (2.4 and 2.6), Solaris and OpenSolaris, and OpenBSD.

Required Memory. The need of memory depends upon the guest operating system you want to run depending on what guest operating systems you want to run, the more memory you use the performance will be good but at least 512 MB memory is must for running the operating. If you are an XP user and you want to install Vista as a guest OS then you will need a memory to run vista plus memory to run XP.

Downloads

You can download Virtualbox for different binaries which comes under VirtualBox Personal Use and Evaluation License (PUEL)

VirtualBox 2.2.0 for Windows hosts

VirtualBox 2.2.0 for OS X hosts

VirtualBox 2.2.0 for Linux hosts

VirtualBox older builds

VirtualBox 2.2.0 for Solaris and OpenSolaris hosts

VirtualBox 2.2.0 Software Developer Kit (SDK)