When I plug my iphone in to my computer I get a message that "a usp device is not recognized"

When I plug my iphone in to my computer I get a message that "a usp device is not recognized" I fear resetting my phone when I haven't had a chance to back it up in itunes.  I cannot connect to my computer thru wifi either.

Have you looked at this article:
iPhone, iPad, iPod touch: How to restart the Apple Mobile Device Service (AMDS) on Windows

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