Rt click on both the iexplre.exe processes in the task manager and open file location. If it is
C:\Program Files\Internet Explorer\iexplore.exe then its the legit MS process.
It’s perfectly normal to see two or more iexplore.exe processes in the Task Manager when an Internet Explorer 8 window is open. This is due to a change implemented in Internet Explorer 8 where the frame and tabs are split, each having their own processes. Each tab has its own process so that the rest of the tabs and the browser frame/window are not affected when a single tab process crashes.
Read more
here.
A radio station was playing on your PC !? Well thats something odd. Perhaps a few more details ...