Loudness equalization

Hi. Here's my dilema.

I've installed Windows 7 Ultimate (x64) recently and everything is going great. Except for the sound...
Windows sounds (and all low frequency sounds) are REALY low. For this issue, i've actually found a solution: turn on the 'loudness equalization' option. It looked like a great solution. The problem has gone away.
But then i noticed that when i listen to music or watch videos (i use Windows Media Player 12 for this), the high frequency sounds are VERY low! But i guess it's the pupose of the 'loudness equalization' option anyway (boost the lows and limit the highs).
So, my question is: is there a way to make Windows Media Player (but just it) not to use the 'loudness equalization'? Like an "application profile" or something...
It's very frustrating to have to choose what to do: listen to music and watch videos or hear the Windows sounds and play games. I'm not confortable with the idea of have to turn it on and off everytime i need to use Windows Media Player or not.
If someone knows how to deal with the low Windows sounds problem (and low frequency sounds as well) without using the 'loudness equalization' at all, it will do just fine too.

Sorry for the size of the text. Just want to be clear.
Thanks!

P.S - I've already tried every version of every driver to my sound card (Realtek). Doesn't seem to be a driver issue...

I've read your post a few times and, I'm not really sure what you are after. Are you trying to eliminate system and application sounds while listening to music? Try clicking on your speaker icon, when your volume slider appears click on "mixer" at the bottom. From there you can turn down or mute "system sounds" while still being able to hear music from WMP12.

Try not to use sound enhancements as I find it just doesn't do music any justice. It will elevate levels that are not meant to be, so on and so forth.