Quote Originally Posted by R&R Reptiles View Post
Sounds like you haven't installed all the necessary drivers for your computer. I would find what kind of sound card you have and go find the correct driver. That should fix your problem. There might also be other drivers that are missing as well.
I was going to say the same thing but R&R beat me to it. I'm 99% positive you don't have all your drivers installed. If you're missing your sound drivers then you're probably missing other drivers as well.

I don't know what kind of PC you have, but if you bought it from Dell all your drivers are available online using your service tag #.