Your site is launching fake computer scans. When I clicked on a thread in the Home Audio forum, a scan of my computer was initiated (not cool), which was detected and shut down by my anti-virus software. This ocurred 3 times in succession. I'm not sure whether you've allowed this to be injected into your site on purpose, or if this is being implemented in some other way, but I thought you should know about it.
If you are allowing this knowingly, it is a severe violation of security and privacy for the users of the site. I will not frequent a site that allows such intrusions.
A little more info. The Virus name is JS_FAKESCAN.SMI. Located in my temporary internet files after clicking on a thread on this site. I see you have a "Run a free scan for Windows errors" add on the site, which I'm wondering is what is launching the scans. If so I repeat this is entirely a violation of your Customers security and privacy. Customers need to request the scan be initiated if they are interested in the service, you can't just launch an unrequested scan of someones harddrive. Please look into this asap.
I was clicking on a link in the Home Audio/Speaker forum. I can't remember which one. I clicked on it 3 times and 3 times it did the same thing. Each time my anti-virus software blocked it (Trend-Micro). I then went back to my Home page and worked my way back to that forum and to the thread.....and this time I was able to get in. It hasn't happened since. However, on my other computer (which has different anti-virus software) it has happened before and the av software failed to pick it up and a scan started from my computer. I don't know what's launching it, but it only happens on this site.
As I said before, there is a bar on the right (see picture below) that looks awfully suspicious.
I'm not sure why it would activate with me clicking on a thread, but it seems a bit of a coincidence.