Microphone has this lagg/echo ...

Hi, thx for helping.My microphone seems to lagg when I'm on voice chat over steam, msn, etc. To be precise, I can hear my voice through my speaker when I speak into it, except my voice is heard two seconds later. It gets pretty annoying, since I speak, hear my own voice, and then the recipient responds. Here some quick specs: Soundcard is onboard Realtek High Definition Audio (drivers are updated to R1.84). Thx again for helping.