My computer is brand new, and I have good anti-virus, and regularly do full scans to avoid anything sneaking in.
As I said, it isn't happening on other sites. Not even a lot with this one, just sometimes, when a page of this site loads, specifically in the forum, the anti-virus pops up to tell me it's just blocked a trojan.
I figured it was a dodgy ad within the site, because it doesn't happen every time I load a page, but the ad at the top does change every time, so maybe one of them is a bit dodgy.
I will update if I find it's happening elsewhere, as that would suggest it's not just this site. But, at the moment, it's only happening here, which sucks, as this is one of only about 5 web sites I actually like and use frequently.
I don't trawl the net looking at all kinds of dodgy stuff, I don't follow any suspicious links on facebook or anything like that, I haven't had anything to do with torrents on this computer, and I don't watch or look at porn either. It seems to me I avoid all the really dodgy areas of the net for the most part.
Like I said, I will update this if the situation changes at all, I just thought it would be good to post this sooner rather than later. Better to be safe than sorry