No audio found?!

Hello,
I went to free up some space and accidentaly deleted my audio from my computer. i have a windows xp-thinkpad. i deleted something called soundmax. i dont have a cd to redownload it. i tried a system restore but it just says that it isnt possible. i tried to go to the audio thing in my control panel, but it is all grayed out and wont let me click anything. i have absolutely no sound on my computer! please can anyone help me. any help would be great!