"I want 4 copies of Windows (but why, actually???)” - For reliability. A noob killed one Windows installation. He boots up the second. He kills the second - boots up the third. He messes up the third - I arrive and restore the previous three from the fourth Windows installation. Do the work four times more, but then you can relax and enjoy the results.
Знание некоторых закономерностей освобождает от изучения многих фактов.
Мечты сбываются рано или поздно, так или иначе.