What's the difference between USB1 and USB2.....?

when it comes to printers. Bought a Lexmark Z730 printer
that won't print. Neither will Z611 printer I had bought before that.
Have Windows XP and dsl line is "ethernet". Any advise would
be helpful. And , yes, its installed, sends every printer request to
queue, but no luck with hard copy.
11 answers 11