i have just had the same problem with mine and my friends account both our facebook messages are not working. both give the same trojan report and it happens on both browsers chrome and IE. i have cleaned both caches and all browsing data i have run full system scans uisng Avast Pro and found nothing. this must be a false positive created by you guys as when we use my friends account with an alternative Antivirus suite (that is also updated) we dont get this report and everything works fine. please resolve this quickly as i dont have the use off a second Pc as does my friend and i am not able to get messages from my business page on facebook. very frustrating.