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Ah yes, me in my younger better looking days (before i got hit with the ugly shovel), but i am mindful that opinions change regulary in the computer world and its always better to get the opinions of those in the know, (which is almost everyone, thank god for system restore after a nvidia update gave me BSOD with a bad pool header)I see you've been here before - http://www.staffordforum.com/xf/index.php?threads/which-anti-virus-my-findings.4314/#post-82221 ..
Malwarebytes free is fine if you run a regular scan with it (or at least whenever you think something weird is happening or doesn't seem right). Microsoft Security Essentials is free too and works nicely alongside. (If you're on Windows 8 it's built in and called Windows Defender)
In my line of work I see more computers with viruses which are supposed to be protected by Norton and Mcafee than any others (so you don't necessarily always get what you pay for!)
From the very early days of antivirus software Norton has always caused problems & is best avoided. Malwarebytes strictly isn't an antivirus programme it detects & removes malware on your computer, I run it regularly to check that nothing has got through. Microsoft Security Essentials always comes bottom of comparative tests and even Microsoft don't recomend that you rely on it on its own. I use Pale Moon browser with AdBlock, NoScript, Ghostery and WOT, Kaspersky as my antivirus and regularly run Malwarebytes.
If you want a really secure browser then why not try LPS-Public Deluxe v1.5.3 (http://www.spi.dod.mil/lipose.htm). It probably reduces your risks to snooping by the FBI, CIA, DoD, DoHS, FSB & SVR, all of whom can probably access your computer any time they want to anyway.