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As ReactOS is still in alpha stage development, we encourage would-be testers to first try it out on a virtual machine before taking the plunge with real hardware. Of course regardless of whether you do a physical or virtual install there are some basic requirements to keep in mind.

• x86 processor, Pentium-class or newer
• 96MB of RAM, 256MB recommended
• 650MB of free space minimum, 5GB+ recommended if you intend to do testing
• VGA compatible graphics card, VESA BIOS 2.0+

For virtual machines, the team recommends the following.

Easy to use open source solution	Tried and true industry standard	Lightweight and ready out of the box

Of course once you're ready to dig deeper we recommend checking the wiki for a more detailed guide.