While searching your forums for information about malware and anti-malware products, I came across this page:
There are a couple of links on that page that take you to a completely unrelated website. Halfway down the page is a link labeled "Mainstream Websites More Likely to Harbor Malware." I clicked this, and a page from a site called "vdare.com" was loaded. The full address is www.vdare.com/posts/hugh-mcinnish . It's some right-wing political blog site. I hope it's not also a malware site!
I found one other link on that page that points to the same page: "Clicking Online Ads More Likely To Deliver Malware Than Surfing Porn Sites."
There may be others - I didn't investigate the entire page. I'm a bit wary now, because it's possible I got some malware just from clicking that link.