Cracking sound when turning the game off

Im experiencing a problem when turning the game off.

It's a very sharp sound, almost like the sound you get when plugging in your headphones into the computer. (Or atleast on mine)

I don't know if this can be a hardware / software released issue to my computer in it self or not. Just wondering if there might be any solution for it, cause does hurt my ears quite a bit.

Any feedback or suggestions are very welcome!

I have exactly the same issue.