Alex Castle is a freelance tech writer based in Honolulu, Hawaii. He specializes in Windows software, how-to articles, and PC peripherals.More by Alex Castle Upgrading to a new operating system can be an intimidating undertaking that massively disrupts your daily workflow. And considering the dramatic interface changes introduced in Windows 8, you may not want to invest in Microsoft's latest OS without first giving it a thorough shakedown. Fortunately, there's an easy, hassle-free way to test-drive Windows 8. Using a program called VirtualBox and the evaluation version of Windows 8 Enterprise, you can try out the new OS for free, without disturbing