belongs on superuser.com Q&A for computer enthusiasts and power users
This is your classic, been-around-for-years close reason. If enough people (four out of five) select this close reason, the question will be automatically migrated to Super User (or whichever site of the five on that pane is selected).
Questions about general computing hardware and software are off-topic for Stack Overflow unless they directly involve tools used primarily for programming. You may be able to get help on Super User.
This is newer, introduced in a more recent of the handful of close-voting overhauls. Questions closed with this reason are not automatically migrated.
How to decide which one is more appropriate?
If you're pretty sure that the question is appropriate for Super User (maybe you participate on that site, and you've picked up a feel), use the former. The question will be migrated automatically. If you're not sure, or the question isn't that great and you think it might be closed on Super User anyway, use the latter. No reason to ship questions around, get the OP's hopes up, just to dash them.
(Questions asked more than 60 days previous can't be migrated)