How do I get my sound back?

I used to hear a sound when I got new email in my inbox. Now I don't get the sound. How can I get it back? I moderate a Yahoo group and need the sound to alert me when I get a notification letting me know I have a post to moderate.

I have a mini DV camcorder that I recorded on. As soon as I recorded, I played it back and it worked fine. About 1 month later, I played the same tape back and no sound now??? I tried the tape on another mini dv camcorder and no sound also. Can anyone...

I've once again had to reinstall Windows and once again I have no sound on my computer. The last time, I found someone who was able to give me a step by step, full detail process on how to get my sound back that actually worked, but didn't save that...

My Laptop (Dell Inspiron 9300) got viruses so i had to reformat it. but in the process something went wrong and the sound doesn't work anymore. My laptop said "No Audio Device", so i bought a USB thing to make it work. it says 3D Sound on the...

I changed the sound so it came out of my laptop speakers instead of my tv to use headphones, but i dont remember how i did it to change it back so the sound comes out of my tv again. I am using a Gateway NV series laptop with windows 7. I have looked...

we moved in to this condo and the people before us had surround sound.. half the speakers quit working.. im not sure what button messed it up but, i disconnected the surround sound box, but no sound comes out of the tv.. how do i fix that?

When I heard the phone ring i hit accept the call and that is what happen. suddenly there is no more sound on my computer. tell me what keys i need to click to get back my computer sound. or better tell me what to do. i will wait for your immediate response...

I am using Windows. I have no sound no matter what speakers/headsets I use. I have restarted my system multiple times. Now, whenever I am using something that would produce sound the sound mixer (the thing in the bottom right hand corner) shows that...

I recently just re did my computer and i have no sound on it what so ever at all.....i did check to see if my computer was muted and its not! so i am thinking its a sound driver problem for me to install one. Can some please help me out by giving me...