So just any computer will do then. Good to know - I have a couple of old laptops laying around, I'll try them.
(Funnily enough, these are the two laptops I was using back in the day when I first heard about BTC. I remember trying to buy around 100 euros worth of it (price was approx. 0.30-0.40-ish) "for the lulz"... and getting a message from wherever I was trying to get the BTC from that they couldn't accept my credit card because the service was for US clients only. So I just shrugged and forgot about BTC for years, and years...
I've tried to recall what website or service it was, but for the life of me I can't...)