Correct me if I'm wrong...........it's better to run your CNC computer without any internet connection, just bare bones and Win XP etc......this will not enable updates to occur and is a fail safe way to prevent virus inclusions too......why would you want to have the internet on your CNC machine's computer?..........I suppose that answer would be if you only had one computer to work with.
The convenience of having the keyboard and screen in one package means many people use a laptop computer for their CNC machine........you can still find laptops with Win XP or 7 32 bit at give away prices.
I do all my small G code programming projects on a stand alone CNC computer running Win 7 32 bit with Notebook and save them to a flash drive.
Ian.