Solved PS/2 keyboard makes ticking sound

[hemjon]

Hello!
My PS/2 keyboard makes a ticking sound with each keystroke. There is a different sort of click for alphabet keys, numbers and arrows. The same ticking sound is heard also when logging in or shutting down. The ticking sounds play for all users. I have tested a wireless USB-keyboard and there was no sound. I have not tested with another PS/2 keyboard yet.
Systems sounds are all off, but ticking continues. The clicking sound responds to volume control, e.g. volume off=no ticking.
The Filter Keys function in the Ease of Access center are un-ticked.

What could be causing the sound? Please help!

 

[hemjon]

It was the Asus Xonar DGX soundcard that was picking up interference from the PS/2 keyboard port. I don't know why it started doing it, but this appears to be a hardware problem instead of a Windows 7 problem. I switched to the mobos soundchip, and everything is nice and quiet when I type my important documents (or actually, play Skyrim).