scary prob with speaker interference

[spamalot]

Hi all,
I have one of my funky problems again and am puzzled: for a few months now I've been getting signal interference from what I believe is a media player somewhere in my building on my desktop speakers. I have deaktivated my speakers now and it won't go away. Today it is not merely interference anymore, it is playing really loud one song over and over again: "I'm a lonely boy" whatever the song is called. Thus I conclude this is a stalker. I have no idea what to do - is there anything anyone might know how to get rid of the bastard? Thanks!
spamalot

[spamalot]

so now I put my realtech settings on "quadrophony" although I only have 2 speakers and it is gone -- still scary that someone can interfere like that with my hardware..... will be greatful for any info you might have
spamalot