No, that is not acceptable. What I would find perfectly fine and acceptable is a comment asking for acceptance if the OP said the solution works but they didn't bother to accept any answer.
That is as much noise as "Please help" in a question, with the added "fault" that it might even imply begging for rep.
Edit: besides, that's not even an answer. The OP asks how to fix USB boot errors and the answer reads "burn a DVD instead".