Computer plays sounds at Random

I can't seem to figure this one out. It seems that my computer is randomly playing sounds for no reason. It's not always the same sound either. I've heard a baseball bat, a ding, a lion roar, a couple of opening bars of songs (One being Start Me Up by the Rolling Stones and the other I believe being by Ashanti), and a few other that I can't really describe.

I originally posted this in the malware forum but they saw nothing and suggested posting it here.

 

It has to be a program running in the background. Disable everything you don't really need and see if the problem persists. If it does, post a list of all your running applications (that is, make a screenshot of the processes tab in the task manager).
When do you hear this sounds? All the time or when browsing the internet?

 

I turned everything off and the sounds weren't happening so I started opening some of the newer programs that had been installed and found that it was happening while running AIM 6.0. Not sure why though.