History of Windows

PBE (Pre-Big Bang)
Unknown OS (20 billion BC/0E1e+308-6200000000)

BTE (Before Time Era)
Oggosoft Vanura -∞ (Update 5)

PE (Planck Era)
Planck Debut Operating System (10 -43s after the Big Bang)

BC (Before Christ)
Oggosoft Vanura -∞ (13800000000 BC) (Update 6-Newer)

Oggosoft Vanura 10000000000 BC

Vanura 10000000000 BC

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Vanura 1 BC