Hello,

It seems like I have a sound problem. When I open the sound box I can test windows sounds and they work fine but on websites I can't hear anything if there is music or sounds. I downloaded something from microsoft yesterday and it seems like it qould have caused the problem but I can't find how to desinstall it. It's called silverlight.
anybody knows how to fix the problem?
yesterday I finally got the sound back but this morning it's not working again...

i'm using windows vista

I doubt that SilverLight would cause a problem but you never know. An explaination is here:

http://www.webware.com/8301-1_109-9714748-2.html

I think that I would first open up the Device Manager and check for any yellow !'s or red X's in the sound, video, and game controllers...Click "+" to open it...

While there I would roll back the drivers for my sound card...Leave legacy drivers alone...If that doesn't work try to update them....And if that doesn't work I would un-install the device re-boot and let Windows re-install it for you.

The next thing to try if either of these don't work would be to go to the manufacturer of your computers website...plug in the model # or service tag# on your computer and select the drivers that were originally installed on your system...Follow the directions on the page for installation.

Silverlight is a browser plug-in. Open Internet Explorer and click on the Tools tab. Click on Manage Add-ons and select Disable Add-Ons. It should be in there

apparently its looking fine on the device manager. tried to update but its up to date. on internet explorer, the sound works. on firefox, it doesnt for example when i use youtube. but if i watch a movie with windows media player it works fine...

Sounds like it is more of a browser problem. I would try and either repair or un-install/re-install firefox and go from there.