Evdo Modem USB Devices Driver Download For Windows 10

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In case you are experiencing USB Device Not Recognized Error, whenever you plug in a USB mouse or Keyboard, you can make use of the following methods to Fix USB Device Not Recognized error in Windows 10.

USB Device Not Recognized Error in Windows 10

USB Device not recognized error in Windows 10 is not only noticed while connecting new USB devices, it is also noticed in case of USB devices like your Mouse or Keyboard that are already plugged into the computer.

Irrespective of the case, you should be able to fix USB Device not recognized error in Windows 10 by using one of the following methods.

  1. Disconnect USB Devices and Restart
  2. Unplug Computer From Power Cable
  3. Update Device Drivers
  4. Check For Updates
  5. Disable USB Selective Suspend Setting
  6. Change Power Management Settings
  7. Uninstall Faulty Device Drivers
Evdo Modem USB Devices Driver Download For Windows 10Driver

Make sure that you do not skip the first and the second methods as listed below.

1. Disconnect USB Devices and Restart

Disconnect all USB devices and then Restart your computer.

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Once the computer restarts, plug back the USB device into the same USB port which was not recognizing it. If this does not work, try connecting the device to other USB ports on your computer.

2. Unplug Computer From Power Source

The reason for USB device not recognized error in Windows 10 could be due to your computer going through minor software glitches.

To clear this, simply Power OFF your computer and also unplug it from the power source. Wait for 5 minutes and Restart your computer.

Sometimes, this simple step can fix USB device not recognized error on your computer.

3. Update Device Drivers

Your Windows computer should automatically update the firmware for all device drivers. However, this may not always happen, resulting in device drivers becoming outdated.

1. Right-Click on the Start button and click on Device Manager option.

2. On the device Manager Screen, expand the entry for Universal Serial Bus Controllers.

3. In the expanded Universal Serial Bus Controllers, right-click on the Unknown device and click on Properties.

4. On the next screen, go to Driver tab and click on Update Driver button.

5. On the next screen, click on Search Automatically for updated driver software option.

After installing updated driver, see if your computer is able to recognize the USB device.

4. Check For Updates

See if an Update is available for your computer. If an update is available, Windows will also install the latest available drivers for your computer.

1. Click on the Start button > Settings Icon > Updates & Security.

2. On the Update and Security screen, click on Windows Update in the side menu and click on Check For Updates button.

3. Allow Windows to check for available updates and install them onto your computer

In case updates are available, the latest available device drivers will also be installed on your computer.

5. Disable USB Selective Suspend Setting

By default, Windows computer is set to conserve power by suspending power supply to external USB devices, whenever they are inactive.

However, this power saving setting can sometimes cause problems like Error Code 43 and USB Device Not Recognized Error in Windows 10.

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1. Open Control Panel on your computer.

2. On the Control Panel Screen, make sure that you are in “Category” view and click on System and Security.

3. On the System and Security Screen, click on Power Options.

4. On Power Options screen, click on Change Plan Settings link located next to the current Power Plan.

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5. Next, click on Change Advanced Power Settings link.

6. On the next screen, click on USB Settings > USB selective suspend setting and select disabled option for “Plugged In” and also for “On Battery” in case you are using a Laptop.

7. Click on OK to save above settings.

6. Change Power Management Setting For USB Root Hub

1. Right-Click on Start button and then click on Device Manager option.

2. On the device Manager Screen, expand the entry for Universal Serial Bus Controllers.

3. Right-click on USB Root Hub and click on Properties.

4. On the Properties screen, click on Power Management tab and uncheck the option for “Allow the computer to turn off this device to save power” and click on OK.

In case you have more USB Root Hubs, you will need to repeat the above steps for them as well.

Note: You can recheck “Allow the computer to turn off this device to save power” option, in case this step has not helped in fixing USB device not recognized error on your computer.

7. Uninstall Faulty Device Drivers

The problem of USB device not recognized error in Windows 10 could be due to faulty, corrupted or missing device drivers.

This can be fixed by uninstalling faulty device drivers and allowing Windows to automatically reinstall them back on your computer.

Note: On rare occasions Windows may not install Device Drivers and you may end up with no USB Ports working.

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1. Right-click on Start button and then click on Device Manager.

2. On the Device Manager screen, expand the entry for Universal Serial Bus Controllers.

3. In the expanded Universal Serial Bus Controllers, right-click on the faulty device and then click on the Properties option.

4. On the next screen, click on the Driver tab and then click on the Uninstall button.

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5. On the pop-up, click on OK to confirm that you do want to Uninstall the driver.

6. Repeat the above steps for other affected devices

7. After all the affected devices are uninstalled, Restart your computer.

Once your computer restarts, Windows should automatically load the right drivers as required for your computer.

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Versions supported

  • Windows 10
  • Windows 8.1

Applies to

  • Device manufacturers of CDC Control devices

Microsoft-provided in-box driver (Usbser.sys) for your Communications and CDC Control device.

In Windows 10, the driver has been rewritten by using the Kernel-Mode Driver Framework that improves the overall stability of the driver.

  • Improved PnP and power management by the driver (such as, handling surprise removal).
  • Added power management features such as USB Selective Suspend.

In addition, UWP applications can now use the APIs provided by the new Windows.Devices.SerialCommunication namespace that allow apps to talk to these devices.

Usbser.sys installation

Load the Microsoft-provided in-box driver (Usbser.sys) for your Communications and CDC Control device.

Note

If you trying to install a USB device class driver included in Windows, you do not need to download the driver. They are installed automatically. If they are not installed automatically, contact the device manufacturer. For the list of USB device class driver included in Windows, see USB device class drivers included in Windows.

Windows 10

64-bit

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. If your device belongs to the Communications and CDC Control device class, Usbser.sys is loaded automatically.You do not need to write your own INF to reference the driver. The driver is loaded based on a compatible ID match similar to other USB device class drivers included in Windows.

USBClass_02

USBClass_02&SubClass_02

  • If you want to load Usbser.sys automatically, set the class code to 02 and subclass code to 02 in the Device Descriptor. For more information, see USB communications device class. With this approach, you are not required to distribute INF files for your device because the system uses Usbser.inf.
  • If your device specifies class code 02 but a subclass code value other than 02, Usbser.sys does not load automatically. Pnp Manager tries to find a driver. If a suitable driver is not found, the device might not have a driver loaded. In this case, you might have to load your own driver or write an INF that references another in-box driver.
  • If your device specifies class and subclass codes to 02, and you want to load another driver instead of Usbser.sys, you have to write an INF that specifies the hardware ID of the device and the driver to install. For examples, look through the INF files included with sample drivers and find devices similar to your device. For information about INF sections, see Overview of INF Files.

Note

Microsoft encourages you to use in-box drivers whenever possible. On mobile editions of Windows, such as Windows 10 Mobile, only drivers that are part of the operating system are loaded. Unlike desktop editions, it is not possible to load a driver through an external driver package. With the new in-box INF, Usbser.sys is automatically loaded if a USB-to-serial device is detected on the mobile device.

Windows 8.1 and earlier versions

In Windows 8.1 and earlier versions of the operating system, Usbser.sys is not automatically loaded when a USB-to-serial device is attached to a computer. To load the driver, you need to write an INF that references the modem INF (mdmcpq.inf) by using the Include directive. The directive is required for instantiating the service, copying inbox binaries, and registering a device interface GUID that applications require to find the device and talk to it. That INF specifies 'Usbser' as a lower filter driver in a device stack.

The INF also needs to specify the device setup class as Modem to use mdmcpq.inf. Under the [Version] section of the INF, specify the Modem and the device class GUID. for details, see System-Supplied Device Setup Classes.

For more information, see this KB article.

Configure selective suspend for Usbser.sys

Starting in Windows 10, Usbser.sys supports USB Selective Suspend. It allows the attached USB-to-serial device to enter a low power state when not in use, while the system remains in the S0 state. When communication with the device resumes, the device can leave the Suspend state and resume Working state. The feature is disabled by default and can be enabled and configured by setting the IdleUsbSelectiveSuspendPolicy entry under this registry key:

To configure power management features of Usbser.sys, you can set IdleUsbSelectiveSuspendPolicy to:

  • '0x00000001': Enters selective suspend when idle, that is, when there are no active data transfers to or from the device.

  • '0x00000000': Enters selective suspend only when there are no open handles to the device.

That entry can be added in one of two ways:

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  • Write an INF that references the install INF and add the registry entry in the HW.AddReg section.

  • Describe the registry entry in an extended properties OS feature descriptor. Add a custom property section that sets the bPropertyName field to a Unicode string, 'IdleUsbSelectiveSuspendPolicy' and wPropertyNameLength to 62 bytes. Set the bPropertyData field to '0x00000001' or '0x00000000'. The property values are stored as little-endian 32-bit integers.

    For more information, see Microsoft OS Descriptors.

Develop Windows applications for a USB CDC device

If you install Usbser.sys for the USB CDC device, here are the application programming model options:

  • Starting in Windows 10, a Windows app can send requests to Usbser.sys by using the Windows.Devices.SerialCommunication namespace. It defines Windows Runtime classes that can use to communicate with a USB CDC device through a serial port or some abstraction of a serial port. The classes provide functionality to discover such serial device, read and write data, and control serial-specific properties for flow control, such as setting baud rate, signal states.

  • In Windows 8.1 and earlier versions, you can write a Windows desktop application that opens a virtual COM port and communicates with the device. For more information, see:

    Win32 programming model:

    • .NET framework programming model:

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