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  • Blog Post: Help! After installing Windows 8.1, my device fails with error code 19

    Authored by Eliyas Yakub [MSFT] One of the common issues reported in Microsoft answer forum for devices and drivers is: after upgrading to Windows 8.1 or installing software package from a third-party Web site, some devices fail with error code 19 (shown in Device Manager). The error code description...
  • Blog Post: Why does my USB device work on Windows 8.0 but fail on Windows 8.1 with code 43?

    Authored by Martin Borve [MSFT] Updated 1/27/2014 by Philip Ries to show how to use Message Analyzer and its latest parsers to more easily diagnose the problem. Updated 7/10/2014 by Vivek Gupta to include the Workaround information. A few USB devices when connected to a port of an Enhanced Host...
  • Blog Post: Link Power Management (LPM) in USB 2.0

    Authored by Vivek Gupta [MSFT] In this blog, I’ll provide an overview of the USB 2.0 Link Power Management (LPM) feature and how it can be used with the Selective Suspend mechanism to reduce system power consumption. I’ll also describe the common pitfalls in LPM implementation in USB controllers...
  • Blog Post: Help! After installing Windows 8.1, my USB drive disappears or file transfers stop unexpectedly…

    Authored by Jim Bovee [MSFT] Last update: April 17, 2014 Note: The registry workaround described in this blog is no longer required. A major Windows update published on 4/8/2014 reverts the USBSTOR.SYS driver behavior to 8.0. As a result, a storage device that uses BOT protocol will not be suspended...
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