I use Norton Antivirus 2003 like many of you when I should use the 2004. The problem with 2004 is that its constant scanning slows one's system down so much that it interferes with downloading. 2003 does not scan new files immediately, so the system isn't bogged down, but it is very easy to catch a virus. I have been hit many times by virus. Although most of them don't crash my systems immediately, they slow my P2P speed down so much that I have to reinstall anyway. I notice that evertime I reinstall my system, the downloading speed is great. But it soon deteriorates back to slow after a while, which varies from week(s) to month(s).
Well, I just reinstalled my systems about a month ago. P2P speed was good for about two weeks. I noticed that it started to slow down a bit, but still usable, just longer wait. Then it started to slow down even more half of the time. After a couple of weeks more, it slowed down even more to the points where I was frustrated.
Well, I haven't scanned my systems for viruses for a couple of weeks although I do keep the virus definitions updated, so I decided to do so. I found a Trojan virus in a Window's application's temporary file. It was difficult to delete, but finally was deleted.
Well I was at the point where I was only uploading, and can't really download much more than a couple of Kb/s. Well I did some reading and opened up ports on my firewall and router like you guys. Well, opening up ports on the firewall helped a little, but it fluctuates quickly back to a couple of KB/s again in minutes or a couple of hours. Very frustrating. Nothing worked.
Getting back to Norton Internet Security (NIS), NIS 2004 worked ok when I first tried it a month ago--the BT light flashed green initially and several times later. Well since NIS 2002 has worked for me in the past, I decided to downgrad back to 2002. The slow downloading speed didn't changed. There is nothing left to do but to reinstall at this point.
I restored my systems with Norton Ghost and went back to NIS 2002. I am using Shadow's 5.8.9 version of BT, and it is good again. The lights are green again, whereas it was yellow 99.9% of the time before and I had a lot of tracking problems too before. My first download was flying, my second is terrible, but the lights are green, and the client connected to the tracker quickly and without any error messages.
Well I definitely will scan my computer at least once a week from now on. And I know that my ports are already opened properly so I shouldn't have to open it later. And I don't have to update my Norton stuffs for it to work either.
I know there is no way to prevent from getting screwed by a virus with Norton Antivirus 2003. I certainly don't want to use 2004 since it bogs down my systems so much. The only solution is to back-up my whole system and restoring it when I have to.
Here is my solution. I have two copies of my C-Drive cloned with Norton Ghost and hidden away (invisible) with Partition Magic. Hell, if anything screws me up again, I am ready. With several click, I can restore my whole system in 10 minutes. Hehe, screw me up all you want you stinking viruses.