ReactOS - Download

ReactOS is free operating system, which provides support for MS Windows applications and drivers. Also it's interface is very similar to MS Windows'.

ReactOS project is still in alpha development phase, so it's sometimes pretty unstable and some Windows applications don't work correctly or don't start at all.

On screenshot: ReactOS doesn't has built-in web browser yet, but it has Downloader application, which can download some basic applications.

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