On a laptop running Windows? As a temporary workaround until someone else here can provide the cure for your current keyboard issue, when you first turn on your laptop and reach the login screen to enter your password for Windows, in one of the lower corners of the screen should be an icon for ease of access. One of the options should be for an on-screen keyboard. You can use this to type the @ symbol to get into your email. Either that, or plug an external keyboard into your laptop and use that.