Can I carry a desktop computer case board on aircraft?

Question

I want to inquire that if United Airline and TSA allows passenger to carry one desktop computer case on board the aircraft .

ps:My computer case size 17.2" x 8.2" x 18.4"(HxWxD)

Thanks if any help

Answer 1

Now why would you want to carry a desktop on board, kind of stupid. I doubt they will let you tho cause of all those things happening.