i will try to be as in depth as i can about my situation. hopefully somebody can help me?

i get a lot of extraneous noise in my computer speakers (noise from the mouse, etc.) after reading many threads i realized that could be caused from many things. anyway i borowed a sound card from a friend so that i could see if that would eliminate the problem.

the sound card was a trident 4dwave dated 1998. i could not find a driver to make it work. so i uninstalled and tried to use my onboard sound card again and now i have no sound.

i have uninstalled and reinstalled in the device manager
device manager says that everything is working properly
sounds and audio devices only shows "modem # 0 line playback"
sound is enabled in BIOS
speakers are on (still get mouse noise) and plugged in
i even tried several restore points and that didn't wor either

here are the details:
Computer is a Micron PC Intel pentium III
Motherboard is Tazer - Tyan S1854 via 133a 4x with integrated components
Onboard Sound is Creative AudioPCI (ES1371, ES1373)(WDM)

please help if you can, thank you