No sound from my computer?

you should really just turn the computer off, if that doesn't work you may have to find the cord of the speaker and unplug that, if there is a wizard for installing you should turn off the computer, the speaker, and unplug it. Turn it back on, and the wizard should pop up after awhile. Speakers can die out, though. If you have a pet, you should check inside of it, but i doubt than any thing's damaged, i'm pretty sure it's just that u have something tangled or mislead.