There has been a few times where I've received emails from my web users where they expressed some issues with a given page they are viewing. They try their best to explain it to me but it's just not registering. I really just wish I could see their computer screens. Well there is software that does allow for this such as: WebEx & Remote PC
They're both pieces of software that are good and thankfully offer you a free trial. But then you have to pony up some minor monthly fees after the free ride is over.