Windows 10 will be a free upgrade and brings new features such as Cortana, Project Spartan, Xbox Live, Continuum mode, and more. Click here for additional details.
Microsoft warns that you should install the preview only if you:
● Want to try out software that’s still in development and like sharing your opinion about it.
● Don’t mind lots of updates or a UI design that might change significantly over time.
● Really know your way around a PC and feel comfortable troubleshooting problems, backing up data, formatting a hard drive, installing an operating system from scratch, or restoring your old one if necessary.
● Know what an ISO file is and how to use it.
● Aren't installing it on your everyday computer.
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