(Of course you'll need to have the system discs to hand.) Right now you can install Google Chrome OS, all the mainstream Linux variants (2.4 and 2.6), OpenBSD, OS/2, ReactOS, SkyOS, DOS, and just about every version of Windows there's ever been. VirtualBox can also be a useful security tool: if you download and test apps in a VM, then any malware you might encounter will be isolated from your main system.Īnd it's the perfect choice if you want to try out another operating system with the minimum of hassle. Or maybe you've upgraded to Windows 10 and find a favourite old app doesn't work any more? Create a Windows XP VM and you might be able to run it again.

If you'd like a closer look at Windows 10 before you upgrade, for instance, then you could install Microsoft's latest in a VM, then access it in a window on your XP or Vista desktop.

It's a powerful capability that has many different applications. Oracle VM VirtualBox is an industrial-strength open source virtualisation tool that makes it easy to create virtual machines (VMs), simulated computers that run on your PC but act as though they were separate systems.

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