danny_boy, the E-mail scanner is on by default. If you double click on the AVG icon that's running in the System Tray, you can then double click on the E-mail Scanner button to see the specifics if you wish. The easiest way to 'test' if the scanner is working properly would be to send yourself an e-mail. At the bottom of the e-mail, it should say something about AVG certified mail.
You don't need to virus check more than once a day. I have mine check at 6:40AM.
