I have a logitech cordless. I have a logitech cordless keyboard and mouse, and every so often when

Question

I have a logitech cordless keyboard and mouse, and every so often when I try to use the @ symbol I get " also when I want to use the ? mark, I get a Capital E with an accute french accent. This is on email.]Can you tell me why this happens.Thank you.Lane [e-mail]