Woah, I would never do any bitcoin transactions on a public computer. I wouldn't even feel comfortable accessing bitcointalk on one. You might get away with not getting your bitcoin or passwords stolen, but why take the risk of that?
If you have enough money to own crypto, you probably have enough to buy a cheap smartphone with which you can access your crypto wallets. Some laptops are even cheaper than a phone right now, and it isn't exactly like you need massive processing power to install and use a crypto wallet.
Unless you are accessing the internet through a VPN connection that you trust then you should not be using public wifi for sensitive information at all.
That is good advice as well. I still think going the smartphone route is the best one, and these days you'd have to be dirt poor not to be able to afford one.