Windows 7: Everyone in any voice chat can hear everything I hear. PLEASE HELP

I am running windows 7 and it has Realtek HD Audio Manager. I have speakers plugged into 3.5mm jack in rear of computer and my Razer headset plugged into my 3.5mm front panel. When I am in any sort of voice chat such as skype, google chat or an in game (computer game) chat, everyone in the call can hear everything I can hear, as clear as they can hear me. It’s not my mic picking up sounds.. I can unplug my speakers and mute/unplug the mic cord and they can still hear all my sounds. I can unplug my headset and speakers completely so I have no mic or spearkers or audio equipment hooked up at all and they can STILL hear my everything. youtube, games, ect. I have read other forums that say to "disable "stereo mix" or "what u hear"" but that option is not on my computer. Any help would be AMAZING. Thanks

moehamster Welcome to the Seven Forums.

Open the Windows playback properties and select Speakers. Next click on Properties and click on the Levels tab, and if present and unchecked, mute the mic.