In general I'm not sure how you could think the battle-worn/old-tech/modular visual style of the Terran race applies more to Windows than Unix.

Whereas terrifyingly-impressive testament to the brutal domination of an evolutionary niche and subsequent uncontrolled (uncontrollable?) growth seems like such a more-natural analogue for Windows.

And that's without even touching the gross, slimy, infested allusions. ;)