Hi Meisha,
I am happy to see that your issue is resolved.
Thanks for posting back.
I have unchecked the option to "Certify outgoing email" in Advanced Settings, yet my emails still have the signature: "No virus found in this message. Checked by AVG - www.avg.com", and I don't want that there. How can I make AVG stop adding this to my emails? Thank you very much in advance.
Never mind, my friend is answering inline to my emails and it's her AVG adding the signature. False alarm… Sorry, Moderator, please feel free to delete this post. Thanks! 
Hi Meisha,
I am happy to see that your issue is resolved.
Thanks for posting back.