F4,

If I am not mistaken Avast does not like to co-exist with any other anti-virus program on anyones computer. I use Avast 4 Home edition (free) on my computer at my house. At my place of employment the computer I use for work has a Anti-Virus program called “Visnetic” which is based on the Kaspersky engine.
About 1 week ago I saw a e-mail for me in my Outlook Express mail on the computer at work. I thought it was suspicious so I deleted it with no harm done. Since I choose to “Leave message on the server” option in O.E. when I got home and opened it up again later that same suspicious e-mail was downloaded to my inbox. Immediately my free version of "Avast 4 Home " edition warned me that the e-mail had the “worm Netsky-C”. I also deleted the e-mail with no harm done. What I am surprised about is that the Kaspersky based Anti-Virus program on the pc at work did NOT warn me about this e-mail yet my free version of Avast DID warn me. So, I guess one never knows which Anti-Virus program will respond better than others at any given time. You may want to look into downloading both “Spywareguard”, and “SpywareBlaster”.
They work very well with any Anti-Virus program and give you the extra protection from Trojans. ;D