Have you tried turning off your Windows Sound Themes?...the noises windows make when you open or close window boxes etc. Could be interfering with your media player.
try this...
Goto "Control Panel", "Sounds & Audio Devices",
Click the "Sounds" tab.
In the 'Sound Scheme' drop down box, select "No Sounds" then click Apply.
When did this problem start? Are you using the M/B onboard audio sockets or do you have an add-on sound card?
Is it making "sounds" like a normal windows "click" sound etc...or is it just static/interference type noise?