Audio driver won't install

One day, i was online then my computer froze. I restarted it amd went back on youtube and I couldn't hear anything. I tried making changes in volume mixer, and I didnt hear any bing when you click volume. I could hear music and video games fine though. I contacted support and they said to reinstall my realtek audio drivers, I uninstalled it and then attempted to reinstall it. It said it worked but it didnt. The they told me to go to system recovery, I tried to install it there, it said it worked, but it didnt. now I dont have a sound driver. The only way I get sound is through headphones, again, I olny get sound on games and music. HELP ME Support said it would cost around 300 dollars to fix or 15 dollars to get recovery discs. I have windows vista home premium 32 bit and an HP s3220n Slimline

PLEASE GIVE ME HELP TO INSTALL AUDIO DRIVERS!!!

Audio driver is realtek HD audio

PS: I DONT WANT TO HAVE TO PAY!

Go here and download the sound driver:
http://h10025.www1.hp.com/ewfrf/wc/softwareList?os=2093&lc=en&dlc=en&cc=us&lang=en&product=3548659