Okay, so i might be building a computer (my fist build) at the worst time possible. i just ordered all my parts and they'll be here in a few days, HOWEVER, windows 10 is not out for purchase yet. my question is, if i buy windows 8.1 now and install it on my rig, will i be able to upgrade it to 10 as i did on my laptop even though we're now past the upgrade launch date? i dont want to screw this up as i really don't want to be stuck with windows 8 or have to pay microsoft an extra 120.