I was watching a video on you tube that I decided to email to a friend but I got this message: default client is not properly installed. I have send from you tube before so why can't I do it now?
It means that your computer is unsure about what program to use to send the e-mail. If you are on XP, you can set it by clicking Start/Set Program Access and Defaults and ensure that there is a dot next to your preferred e-mail client