This video from GoCosmos.org demonstrates how to install the Cosmos User Kit.
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Cosmos is an open source microkernel .Net-based operating system written entirely in C#. The folks over at SharpOS.org, who have also created a microkernel OS written in C#, have reasonably objected to claims that Cosmos is the first OS of this type. Both operating systems can be installed and run from a USB jump drive, which only adds to their geeky cred.