Hi mowit,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
Please respond with which Operating System you are running and I will be happy to research this question about the twain drivers.
Which Windows Operating System am I running?
Mac OS X: How Do I Find Which Mac OS X Version Is on My Computer?
I am always happy to help so please respond back at you convenience.
Thank you.