system
2
lees4,
Here is part of a post from my friend Technical -
You can check this:
1. Looking at the icon in the system tray
2. Adding a note in the Inbound/Outbound messages (both for Internet Mail or MS Outlook if you use it)
3. Right clicking a message, choose properties and see if there are two headers like these:
X-Antivirus: avast! (VPS 0404-5, 08-04-2004), Inbound message
X-Antivirus-Status: Clean
I have attached a picture of what Avast’s email checking icon looks like. 
Happy Easter