Vista - Vista Home - No "windows sounds" from laptop.

Suddenly my HP pavillion laptop will not play any "windows sounds".
When i test them under control panel/sounds and sounds tap, they will
also not play there. Also in internett sounds, will not play (youtube
etc.). Have tried firefox and explorer. Sounds from dvd, mp3, skype,
etc works perfectly. What toubuleshooting i have done so far ;

- Updated drivers from HP homepage.
- Rolled back driver to try earlyer.
- Restored windows at a point that i know sounds worked.
- Checked if sound are muted or turend down in the mixer.
- Comfirmed that sounds are enabled in internett options.

I use the internal speakers in laptop, so now loudspeakers are
connected.
And i have not done any changes in the sound scheems in sound options.
Its strange coz they stopped working all in a sudden...

Please ANYONE!! I need help with this - i am about to though pc out
the window.
Any reply will be helpfull here. I beg you guys and girls!