SOLDIERX.COM Nobody Can Stop Information Insemination

I could be doing anything at all on my computer, watching a movie I downloaded or sweeping for malware and I'll hear it...the ever so annoying and slightly alerting sound of the Internet Explorer clicking. There is just one problem, I do not use IE. Any thoughts on what could be causing me to hear what sounds exactly like the IE clicking noises when I don't even use IE? I'm slightly concerned about my security now.

Could it be my XFire? I think it might use the same or similar protocols to access web interactions. I have XFire to keep in touch with a friend and I realize how it's used and an information gathering program but I sort of need it. Do you think it's XFire or should I be more concerned here?