Chirp Chirp!

Ever since I came back from holiday, the laptop at work is making chirp noises, like it's got something wrong with the sound card. I disabled sounds but that hasn't worked and it sounds like a fucking sparrow is making home in it.

I've run a troubleshoot on the sound card and it says that nothing is wrong. I don't know what they did while I was away but it's sure as fuck annoying now! Any ideas?