I suddenly have no sound on my computer and in control panel,audio devices it says i have none?! what do i do?

i can't get any sound on my pc yet i had sound yesterday!! i don't have any viruses as i'v cleaned my computer up!I suddenly have no sound on my computer and in control panel,audio devices it says i have none?! what do i do?
Lately, I have been having the same problem, sometimes it's as easy as restarting the computer. If that doesn't work, I end up having to uninstall an reinstall the sound device. You can get to that through your control panel and going through the troubleshooting method, it usually will tell you different things to check, and how to check them. Hope this helps.I suddenly have no sound on my computer and in control panel,audio devices it says i have none?! what do i do?
1. Click Start,choose run and type devmgmt.msc and press Enter.





2. Double-click Sound, video and game controllers.





3. Right-click your sound card and click Uninstall.





4. Restart the computer and the sound card will be reinstalled automatically.
i think you need to download this then install it and restart your computer.......download the second one
I think first u should check that all the wires are plugged in their right places.Then u should try to re-install ur sound driver.
try making sure everything is plugged in correctly.


If that doesnt work try restarting ur computer.
Maybe your sound card is out.
maby speakers became unplugged from back of computer