I’ve used both AVG and Avast and they are excellent, but I want to mention that you may have a hard time getting that #%@ Norton off your computer.
Before you try Control Panel’s Add & Remove Programs, I suggest you get the free Revo Uninstaller. It not only deletes the program, but all mentions of it in the Registry and all folders and files.
Norton tends to insinuate itself all through your system, and is hard to get rid of completely.
Some will soon sign in with other suggested free antivirus programs.
I’ve used AVG for years, with nary a virus (though my surfing habits are pretty mundane). Upon buying a new computer recently, my nerdiest friend suggested to me that AVG may no longer be the best free antivirus software out there, but it’s still solid. I’ll probably stick with it just for the convenience.
I’ve used Symantec (Norton) and McAfee in corporate environments, and AVG and Avast at home. I’m 100% happy with Avast. Small footprint. Automatic updates. Not a hint of intrusion since I’ve been using it.
AVG and Avast are similar enough so that either one is OK. The key is to keep updating whichever one you choose on a daily basis.
If you don’t update, which unfortunately people often fail to do, no anti-virus program will help
I use AVG 'cause it’s a bit quicker for me with Vista. I found AVG runs fine as long as you disable the email and link checker, 'cause otherwise AVG will be checking each link on every webpage before it lets you see it.
I also agree with the poster who recommended Revo Uninstaller, this is a must.
My suggestion is to try them both for a month and see which one is better suited to your needs.
Always use Revo Uninstaller to uninstall the one you don’t want. Revo Uninstaller is great at getting most if not all, of the program off your computer.
Whichever one you choose you should augment it with Malwarebytes’ Anti-Malware which has a free version and perhaps Spybot as well. Between Avast/AVG and Spybot/Malwarebytes, as long as you keep them updated there is little they’ll miss.
I like and use Revo Uninstaller, too, but just wanted to note it’s probably worth running Symantec’s own Norton Removal Tool (which I have also used in the past).
On topic, I’ve used Norton 360, ZoneAlarm, and PC Tools’ Internet Security at various times, and I’ve found AVG Anti-Virus to be the most PC-friendly (low or no drag on resources, does what it says, operates silently and efficiently, etc.). The folks over at Lifehacker seem to agree as well, for what it’s worth.
No opinion on free anti-virus programs, but I want to suggest doing a web search for “Norton Removal Tool” as this is the program that Symantec provides to remove its programs.
I like Avast. One of the best features is the audio warning when it detects a virus. This is especially useful to keep you from getting fooled by the fake antivirus warnings. If you don’t hear “Virus has been detected,” then it’s not your antivirus.
I use Comodo Internet Security, which has an excellent firewall and comparatively good anti-virus. Some users find the firewall and security dialogues can be a little too ‘talkative’, depending upon the configuration, but it has many useful and novel features for a free application. It’s also incredibly light on resources (typically <3MB of RAM) which is something rarely managed by most of its paid-for competitors.
I prefer Avast over AVG simply because the updates can happen transparently and behind the scenes, not as a big popup dialog occupying half my screen for a freaking auto-update.
They did, actually. Go to Settings -> Update (Basic) -> Details -> Set Running Mode to Silent and uncheck the “Show sliding box after automatic update” box and the “Show update progress” box.