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When I updated to the latest FF & Adobe, my sound device doesn't work? Ubuntu disk showed speakers and sound card work, but not with windows.

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I am running Dell Optiplex GX 260, win xp, sp3, ie 8, FF 3.6.15. Previously to the latest updates to FF and Adobe, my sound worked. Since then, no sound, and Windows says that the audi/visual device not working, and no amount of clicking will help. I popped in a ubuntu disk w/o installing, and it played the sounds over the speakers and sound card just fine. Any suggestions?

I am running Dell Optiplex GX 260, win xp, sp3, ie 8, FF 3.6.15. Previously to the latest updates to FF and Adobe, my sound worked. Since then, no sound, and Windows says that the audi/visual device not working, and no amount of clicking will help. I popped in a ubuntu disk w/o installing, and it played the sounds over the speakers and sound card just fine. Any suggestions?

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See:

You can click the Volume icon on the Windows Taskbar near the clock and click the Mixer link at the bottom to open the mixer.
You can adjust the volume level for each application in that window, so make sure that Firefox is not muted or set at a low level.
You will only see the Firefox program in the Mixer if you are on a website that plays sound.
Also check the volume setting for the plugin-container process.