what for VIs udb rev 5 or after devices are shown in device manager.

jraju

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Hi, Could someone say, what is these usb adapter devices shown in device manager.
I ask this query, because, randomly, i get these items get yellow exclamation marks .
Is it usb port devices or something other than that
there has been nothing found in the web, as I search.
please
I am enclosing a picture of my device manager and the last three ttems are thosevia usb devices.png
 

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Microsoft Windows 7 Ultimate 64-bit 7601 Mult...Intel(R) Core(TM)2 Duo CPU E7200 @ 2.53GHz4.00 GBNVIDIA GeForce 210
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PC/Desktop
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custom build
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Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
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Intel(R) Core(TM)2 Duo CPU E7200 @ 2.53GHz
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