I’m amused by how many really good questions are prefaced with some variation of the words “This is a stupid question, but…”
I think my all-time favorite was when a non-techie asked me: “This is a stupid question, but what is a byte, anyway?”
(Short answer: a bit is a one or a zero represented in digital data — basically “yes/no” or “true/false”. A byte is a grouping of eight bits that, among other things, can represent a single letter of the alphabet. Ultimately all information on your computer is made up of lots and lots of bits.
Long answer at Wikipedia.)