What’s new in the Windows Developer Preview for USB?

There is a lot of news coming out of the BUILD conference this week.  In the realm of USB, we’ve released preliminary documentation of the USB 3.0 core drivers.  Check out new architectural diagrams and client driver interfaces!

While we’re at at it, the BUILD conference is also bringing you several USB-related sessions and pre-recorded videos.  Check back later if a video is not present.

Note: Windows Developer Preview is a pre-beta version of Windows 8 for developers.

Comments (7)

  1. xpclient says:

    VMware Workstation 8.0 has virtual hardware support for xHCI USB 3.0 controllers. Should that work in Windows 8 DP?

    Downlevel OSes are still undecided? Windows Vista SP2 and Windows 7 SP1 are in mainstream support and current generation OSes. I expect Microsoft to not just abandon these users for USB 3.0 support. Even during XP era, USB 2.0 was brought downlevel to Windows 2000 SP4.

  2. David Grayson says:

    That's very cool that WinUSB devices will no longer require a driver in Windows 8.  Thank you!

  3. Eliyas Yakub [MSFT] says:


    Just want to be clear.  WinUSB devices will require a driver which is WINUSB.SYS. What you don't have to provide on Windows 8 is an INF if you build the device to have a MS OS descriptor as described in the documentation. Win8 will use the inbox INF to install the winusb.sys based on the compat-id created from the MS OS descriptor.

  4. Ben Voigt says:

    I hope there'll be a registry key for black-listing devices from auto-loading WINUSB, in case you want to use the device with another driver.  (In most cases, you'd simply uninstall the driver you didn't want to load, but this isn't a good option for winusb.sys since it's used by such a wide variety of unrelated hardware)

  5. Todd Day says:

    Will the WinUSB descriptor behavior be backported to Windows 7 in a future service pack?

  6. Randi Rayne says:

    HP Printer connectivity… when can we expect to be able to install printer drivers of some type of functionality. Does anyone know the progress on this?  

  7. Rob says:

    Where is MIDI for musicians?