microsoft, yes. other os's or software? not necessarily... take Ubuntu for example. their code is free source, and rightly made so. the people using it are the ones building on the next release. alot, if not most, other software companies release a FINISHED product, unlike microsoft who likes to make a ton of money by making sure that people have to come back for repairs and/or assistence.
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Current system: Shuttle Running 1.23GHz Intel Celeron, 256 ram, XP Home 120GB hdd
Building new system w/ EVGA 680i mobo, 2 gig Mushkin 4-4-4-12 RAM Intel q6600, EVGA 9800GTX, sitting in an XClio Windtunnel