The problem was first noticed by a user,PuujalKavidzion Avast Forums.
He noted that he was using Avast Free version 11.1.2241 with Windows 10.
He noticed that it was adding an automatic email footer in his Gmails.
He noted that Avast is adding an unseen signature in his emails.
So, even though youDONT have Mail Shield installed, it could still be appending the signature.
Also Read-Best Free Antivirus Software For Windows 10 PC
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source: www.techworm.net
