But seriously you won't get a virus from just browsing the forums. To be honest with you I havn't run anti-virus for ages now but I can guarantee you that I don't have any viruses - they're actually pretty hard to pick up from everyday browsing. The issues really only start when people use warez/pr0n sites etc.
In all my years of PC using i've only ever had two Virus' and both were thanks to my own stupidity.
If you got a Virus on THIS forum using a search feature chances are you already had one, tbh. Get a decent browser, some AV software, and do LOTS of Scans in safe mode.
i have been using Ad ware 2007, Spybot search and destroy, avg anti-rootkit, avg anti-virus, avg anti-spyware, nod32, avast, norton internet secruity 2006 and regrun
if you ran all this, and still managed to get a virus going on your system, that means
1) you can't read the warning messages from your AV software
2) you really wanted to get a virus
3) you never actually found out that there are updates available for AV software
4) you should try two handed browsing for a change
Or, much simpler, people (most computer users) are very ignorant about viruses and malware, no matter how sophisticated and snob they think they are. For instance, someone may have installed software after someone else told him "Google is your best friend"... You know, sometimes Google is your worst enemy.
As you can see, it's promoted through spammy mail, which is nowadays one of the most common vehicles of self-inflicted pain. Since all the anti-malware he uses is unable to locate or eradicate what he got, it's probable that there's a Browser Helper Object in Explorer that makes pop-ups appear. It may not be malware, just adware, and it may have been installed accepting some kind of legal agreement. There's a limit for antispywares: in most cases for legal reasons they cannot eradicate something that was voluntarily (although somewhat unconsciously) installed by a user. If this is the case the software is legitimate although questionable; there might be a voice in Add/Remove Programs, but I wouldn't use it first since if it was really malware (and not simply adware) it could do more harm than good. But I'd check for interesting entries in Add/Remove Programs and report for Search Assistants and similar.
HiJackThis can show this BHO and related files and help uninstall it. There are some caveats, though.
1) You must identify correctly the BHO to eradicate, and you must be careful since a blind usage of HijackThis could limit or cripple the functionality of a computer.
2) If the malware/adware is protected by a rootkit or by some form of antiuninstall it may be much more difficult to eradicate it since it would keep reinstalling.
3) If the hosts file has been modified it must be returned to the original state deleting additional lines.
There's much more than this, of course. Just one hint: CAREFUL. You must know what you are doing, and that's very different from thinking you know what you're doing. In case you don't, refrain from action, offer relevant information and seek for advice in the right places and from the right persons.
The only thing protecting my computer is windows firewall and AVG. I know there are hackers about, but I seriously don't know why they would want to hack my computer. Other than that, virusses, when I get one, it's usually solved pretty quickly. Otherwise I have to format, but that happend long ago (two computers ago really ). So meh, I just try to know where I'm going, what I download and such..
Because your computer is connected to the Internet, and as such is a valuable resource: it can offer bandwidth, an smtp engine installation to convey spam via botnets, space for file servers.
And because you are a valuable resource: a computer can offer advertised searches via adware, it can contain relevant personal and financial information that can be translated into real money that you'd lose in a way or another.
And it really doesn't matter who you are since the criminals willing to exploit vulnerabilities act on a mass scale: if you have no valuable resources there will be someone else who has them.
Take, for instance, spam: a tiny minority of users answers to spam, but that tiny minority has to be computed on a mass scale, so that tiny minority amounts to a lot of people, and then to a lot of money.