I am back on xp, got rid of all the samsung junk and now downloading a few software packs to test the ion. First battery charge lasted for 4hrs. I hope that will expand at least over 5hrs. I love the keyboard, I can really got type on it. Just the backspace key is a little small. Having the windows key at the right side isn´t that of a problem. Just using it for win+D to get to the desktop.