![]() If your device specifies class code 02 but a subclass code value other than 02, Usbser.sys does not load automatically.With this approach, you are not required to distribute INF files for your device because the system uses Usbser.inf. For more information, see USB communications device class (or USB CDC) Specification found on the. If you want to load Usbser.sys automatically, set the class code to 02 and subclass code to 02 in the.The driver is loaded based on a compatible ID match similar to. If your device belongs to the Communications and CDC Control device class, Usbser.sys is loaded automatically. Windows 10 In Windows 10, a new INF, Usbser.inf, has been added to%Systemroot% Inf that loads Usbser.sys as the function device object (FDO) in the device stack. ![]() Usbser.sys installation Load the Microsoft-provided in-box driver (Usbser.sys) for your Communications and CDC Control device. In addition, Windows Store applications can now use the APIs provided by the new namespace that allow apps to talk to these devices. Added power management features such as.Improved PnP and power management by the driver (such as, handling surprise removal).In Windows 10, the driver has been rewritten by using the that improves the overall stability of the driver. Microsoft-provided in-box driver (Usbser.sys) for your Communications and CDC Control device.
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