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Entombed runs on any Windows XP, Windows Vista, or Windows 7 computer, laptop, or netbook with .NET 3.5 or later installed. The Entombed installer will attempt to download anything required for the program to run, including .NET (which can be a sizable download.) Entombed can also be run on an Apple Macintosh through VMWare Fusion, Parallels, or similar program.