I'm using 8 on a non-touch laptop. I generally like it, but the most frustrating thing to me is that I can't "go back" to a previous screen. For instance, I open an email attachment and it automatically goes into full screen viewing. When I'm done looking at the attachment, I have no idea how to go back to the previous email screen. So I have to go all the way back to the start screen, and then into my email to get to the previous page. I'm clearly doing it wrong. Help!