Windows 7: sound crash

Speakers stop when I'm browsing

In Windows 7 browsing the internet interferes with external audio speakers. Let me explain:
When I browse the internet my USB-speakers just stop. Sometimes, less frequently, it also happens without surfing, apperently spontaniously. When I unplug and replug my speakers, I get them back to work.

What didn't help so far:
- Use a different browser (Chrome -> IE)
- Use different speakers (Logitech Z-5 -> V20)
- Use a different sound application (WMP -> VLC)

It seems some frequently used code or script in webpages is taking the speakers in hostage. What do USB-speakers have in common with websites??? What could this be?
It doesn't happen when I use the built-in speakers from my laptop. What is the difference between built-in and USB-speakers in this respect?

Who has a solution? Any new thought are welcome!!!

Built in speakers have a connection called somethting beginning with A- (can't remember off the top of my head right now, sorry )
One thing you haven't tried - try a different USB port. The one you are using now could be a bit dodgy and the USB cable could come loose at times.

@Lil' Domii: I'm busy checking the difference between direct USB-ports and the ones in my port replicator (simple docking). So far it seems that the fixed USB-ports don't suffer from the sound failures as the ones in the docking do. (Although they're not dodgy at all)

Could it be a shortage of electric power to the speakers when the docking's USB-port is used? Using the docking stretches the power line. The e-power isn't so high for USB-speakers anyway.

I'll keep testing this hypotheses. Thanks!!

No worries the friend of arjeh!