Okay so here is the problem when I load Firefox my Homepage is set to Yahoo the first thing I usually do is check my email, well I click it and nothing happens. Nothing even loads, not the news links, featured stories. I click on the link(s) and nothing happens.

I can check my Google email fine, as well as other sites, when I click on links they load. But nothing on Yahoo, works. At first I thought it was over heating but this has only happened this morning when I turned on the computer, I have Avira running a full system scan and it is at 99.8% complete so I don't think it is a virus. No detections, no suspicious files, and only 2 warnings.

What could be the problem