I have installed Avast Free Antivirus in my system running on windows 7 after my friends recommendation. I did not had any issue with the installation of it but since running scan I have started getting repeated 'Trojan Horse Blocked' / 'Malicious URL' alerts when I am checking out my friends profile at facebook. I am not getting any alerts when I am removing Avast Free Antivirus, so it seems there is something wrong with the avast antivirus. Anyways I just wanted to know if there is a way to sort of this issue ??