|How is your mic settings? Even if you dont have a mic (Or if you do) you will get some kind of weird staticy feedback.|
On the bottom right you should see your sound icon. Click it to open "Master Volume"
On the top right of that window click Options then go to Properties.
Click Mixer Device, and click whatever input you see.
Click OK. Now the menu should have changed, make sure "Recording" is all the way down (IE: muted)
Did the problem go away?
Also make note your mic wont work unless you unmute it again later on.