Skype with USB Webcam/Mic causes intermittent audio output

Windows 7 Pro can play mp3 files flawlessly.  So this is not a sound system issue at the basic level.

When I plug in a Logitech C310 USB Webcam/Mic it all seems fine enough as well.
When I install Skype all seems fine enough also.

But, when I try to use Skype, I get the following popup:
"You just plugged a device into the audio Jack"
"You just unplugged a device from the audio jack"
First one and then the other every few seconds just like there is someone back there throwing a switch... it's that regular.  And it only seems to happen when there is audio output from Skype.

Well, of course there is *NOTHING* going on with the actual audio jack.  In fact, if I run Skype at the same time that I play an mp3 file, the mp3 file continues to work great.  But the Skype audio is intermittent at about the same and at about the same rate as these popups - although I can't correlate them closely enough to say which allows sound and which stops it from Skype.

I really need to get this fixed....
LVL 27
Fred MarshallPrincipalAsked:
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David Johnson, CD, MVPOwnerCommented:
try a different usb port, the webcam may be defective
Known issue with skype.

Close all open app and then run this fixit

Restart pc and check.

Fred MarshallPrincipalAuthor Commented:
I ran the fixit which seemed to be helpful.  Somewhere I read about downloading a new driver.  I had not done that before because "checking for updated drivers" from Device Manager always said the latest driver was installed.

So I got a new driver from Logitech for Win 7 64 (as nearly as one could tell - it seemed to be auto-identifying) and fixed both Win 7 64 machines that were having this trouble.

It was strange that the webcam/mic unit would install right away the first time.
It was strange that the Skype voice check worked fine the first time.
Then all h*** broke loose and eventually the output sound did not work at all - no more intermittency at least  :-(

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Fred MarshallPrincipalAuthor Commented:
The fixit seemed rather comprehensive and may have been necessary in addition to the new driver.  Also, I had to select the speakers for Skype (i.e. in Skype) because they weren't the right ones.
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Windows 7

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