I'm building a mediaserver to hold my mp3s, ripped DVDs and TV recordings from my HTPC. Most of this server's activity will on my home network but occasionally I'll need it to go outside my network and connect to the Internet at large. I'm going to put this server in a place where I cant easily fit a monitor so once its set up, I'm going to run it remotely with PC Anywhere(The Server's running XP Home so I cant use Remote Desktop). I wont be logging into it every day or knowing me probably not even every week. I dont want to be streaming media to or from the server and have it come to a halt because the antivirus threw up a dialog box that I cant see because I'm not logged in to the server. So I want to have a antivirus that will automatically update itself and perform scans without my intervention. I'd also like the program to be light on resources. Not so much on memory but on CPU load as I may do quite a bit of transcoding for my HTPC. I was thinking of NOD as it seems from the posts I read abut it here and elsewhere it seems to fit the bill. But I've never used it so I'm open to suggestions of other prorams. Thanks in advance.