long story short, this will be my first build i build myself. I am just wondering which version of windows 10 i should buy (i will be going 64 bit) but i mean am i supposed to go with pro or home version? Second question, should i get the USB version or the regular version? Third question, if i will be installing this on my M.2 as the boot drive, will i need to leave my HDD out of my build (not installed) until i install the SSD with the OS? I have never installed a OS directly myself so i do not want it to automatically select the wrong (HDD) and install it there instead of my SSD.