Windows Chicago Alpha / Pre-Beta Boot Screen and other... (derived from simplephpblog file blog\content\14\03\entry140312-205500.txt)

Take a look at
http://monkey-hole.co.uk/esa/os/ for very early beta versions of Windows, there are even virtual machines (for Microsoft Virtual PC) to try something strange like Berkeley 2.11 BSD.
A bit simple/poor boot screen also for Windows Chicago Build 73, although it's very rare:



To remember: There is also an interesting blog which covers a lot of different virtual machines: http://virtuallyfun.superglobalmegacorp.com/

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