So, I found 2 softwares that are really good and if you are also having this problem or need better sound for any reason, here we go:
1- Breakaway audio enhancer: will boost the windows sound.
http://www.claessonedwards.com/index.php?option=com_content&view=article&id=46&Itemid=59
2- DFX audio enhancer: will boost and enhance software sounds, like windows media, winamp, etc.
http://www.fxsound.com/dfx/pages/download/index.php
both are really good!
anyone know another one? I want to try all possible options.