USB Driver Download For Windows

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This package contains the files needed for installing the EasyCap USB Video Capture Adapter Driver. If it has been installed, updating (overwrite-installing) may fix problems, add new functions, or expand existing ones.
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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

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:

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:

Way 1: Download and Install the Drivers from Manufacturers Manually

When you download drivers manually, ensure that you download the drivers from official manufacturers, which are definitely safe to your computer. The official manufacturers could be your PC manufacturer (Dell, HP, Lenovo, Acer, Asus, etc.) and the device manufacturer (Intel).

It is recommended to go to your PC manufacturer’s website to check for the latest USB driver for Windows 10 first, as they may customize the driver. Before you get started, ensure that you know the PC model and the specific operating system that you are using (Windows 10 64-bit or Windows 10 32-bit). The PC manufacturer may not release Windows 10 drivers for your PC model, in this case, go to Intel’s official website to download the driver.

If no Windows 10 Intel USB 3.0 drivers can be found from manufacturers, download the driver for Windows 7 instead, which is always compatible with Windows 10.

Usb Driver Download For Windows 7

The downloaded driver is always in self-installer format. If you fail to install the Windows 7 driver in Windows 10 using setup file (.exe), you may need to install the driver manually step by step using .inf file. If this is your case, follow these steps to install the Windows 7 driver.

1. Unzip the downloaded driver file to a specific location.
2. Open Device Manager.
3. Expand category Universal Serial Bus controllers and find Intel® USB 3.0 eXtensible Host Controller. Note if the driver is missing or corrupted, you will see a yellow mark next to the device. Probably, the device name will be “Unknown USB Device”.

4. Select Browse my computer for driver software.

5. Select Let me pick from list of device drivers on my computer.

5. Click Have Disk… button.

Usb Driver Download For Windows 8

6. Click Browse… button to navigate to the folder where you saved the unzipped downloaded driver file.

7. Select the .inf file then follow the on-screen instructions to install the driver.

Way 2: Download and Update the Driver Automatically

If you don’t have patience, time or computer skills to update the driver manually, you can do it automatically with Driver Easy.

Driver Easy will scan your computer and detect all problem drivers. You don’t need to know what operating system your computer is running. You don’t need to risk downloading the wrong drivers. You can update the usb 3.0 driver automatically with the Free or the Pro version of Driver Easy. But with the Pro version it just takes 2 clicks (and you get full support and 30-day money back guarantee).

1. Downloadand install Driver Easy.

2. Click Scan Now button. Driver Easy will scan your computer and detect all problem drivers instantly.

Usb Driver Download For Windows 7 Free

3. Click Update button next to the Intel USB 3.0 driver to download and install the correct version of this driver. Or click UpdateAll button (if you go Pro) to update all drivers automatically.

Update Usb Drivers Windows 10

The Pro version of Driver Easy comes with full technical support.
If you need assistance, please contact Driver Easy’s support team at support@drivereasy.com.

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