Windows 7 Sound Locked Off

Sound is locked off (diagonal no entry) at all times.

I can test that the sound is working but whenever I change volume levels, for example, is always changed back to locked.

This works in both user and admin modes.

Any ideas?
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edhastedAsked:
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Benjamin VoglarIT ProCommented:
Yes. Update The SoundCard Driver.

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edhastedAuthor Commented:
Will try tomorrow.

Ed
nobusCommented:
is this a Mac?   most solutions for locked sound are for Mac
here the permissions - or plugging headphones are listed as solution :
http://forums.macrumors.com/threads/macbook-no-sound-volume-control-locked.346733/
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edhastedAuthor Commented:
As I said in the title it's Windows 7 but I will remember that when it comes to Macs - many thanks.
nobusCommented:
i know you said win7, but it can be wondows on a Mac, or a pc with both installed
if you don't tell us more - we can only guess
edhastedAuthor Commented:
Updating the drivers for the sound did the trick - many thanks.
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