在Windows中重新启动操作后，Microsoft Usbccid 智能卡读卡器^{(Microsoft Usbccid Smartcard Reader)}可能会显示错误状态并在黄色三角形中显示感叹号，表示设备无法正常工作。让我们学习如何修复它。

Microsoft Usbccid智能卡读卡器 ( WUDF ) 不工作

除了错误信号之外，您还会看到带有以下描述行的消息。

此设备无法正常工作，因为Windows 无法加载此设备所需的驱动程序^{(Windows cannot load the drivers required for this device)}。（代码 31）

{手术失败}

请求的操作不成功。

这是因为智能卡驱动程序尝试创建智能卡类扩展的实例，但尝试失败并且驱动程序拒绝加载。

什么是Microsoft Usbccid 智能卡读卡器^{(Microsoft Usbccid Smartcard Reader)}( WUDF )？

Microsoft Usbccid Smartcard Reader是一种易于安装的设备，用于通过USB协议即CCID或芯片卡接口设备将智能卡^{(smart card)}与计算机连接。使用该协议的优势在于它不需要每个智能卡制造商提供自己的读卡器或协议。

当Microsoft Usbccid 智能卡读卡器^{(Microsoft Usbccid Smartcard Reader)}处于问题状态时，如何修复设备管理器^{(Device Manager)}中的代码 31 ？^{(Code 31)}

为确保驱动程序初始化成功，您需要添加RetryDeviceInitialize注册表项并重新启动计算机。

1. 打开注册表编辑器。
2. 导航到此密钥 - CryptographyCalaisReaders。
3. 创建一个新的 DWORD（32 位）值。
4. 将其命名为 RetryDeviceInitialize。
5. 双击它并输入值为 1。
6. 重新启动您的电脑。

该方法要求您对注册表编辑器^{(Registry Editor)}进行更改。如果您错误地更改注册表编辑器^{(Registry Editor)}，可能会导致严重后果。在继续之前创建一个系统还原点。

Press Win+R打开“运行”^(Run)对话框。

^{(Type Regedit.exe)}在框的空白字段中键入 Regedit.exe ，然后按 Enter^(Enter)。

当注册表编辑器^{(Registry Editor)}打开时，导航到以下路径地址 -

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography\Calais\Readers.

切换到右窗格，右键单击并选择New > DWORD（32 位）值。

将其命名为RetryDeviceInitialize。

双击^{(Double-click)}该条目以编辑其值，然后在出现的“编辑字符串值^{(Edit String Value)}”框中输入值 1。

重新启动您的电脑。

在此之后，Microsoft Usbccid智能卡读卡器 ( WUDF ) 应该开始在^(WUDF)Windows 10中正常工作。

阅读^(Read)：修复未迁移的设备消息^{(Fix Device Not Migrated message)}。

Microsoft Usbccid smartcard reader (WUDF) not working in Windows 10

Following а restart oреrаtion in Windows, the Microsoft Usbccid Smartcard Reader may show an error status and display an exclamation mark in a yellow triangle, indicating the device not working properly. Let’s learn how to fix it.

Microsoft Usbccid smartcard reader (WUDF) not working

In addition to the error signal, you’ll also see a message bearing the following line of description.

This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)

{Operation Failed}

The requested operation was unsuccessful.

It occurs because the smartcard driver tries to create an instance of smart card class extension but the attempt fails and the driver refuses to load.

What is Microsoft Usbccid Smartcard Reader (WUDF)?

Microsoft Usbccid Smartcard Reader is an easy-to-install device that is used to connect a smart card with a computer via a USB protocol namely, CCID or chip card interface device. The advantage of using this protocol is that it negates the need for each manufacturer of smartcards to provide its own reader or protocol.

How to fix Code 31 in Device Manager when Microsoft Usbccid Smartcard Reader is in a problem state?

To ensure a successful driver initialization, you’ll be required to add the RetryDeviceInitialize registry key and restart the computer.

1. Open Registry Editor.
2. Navigate to this key – \Cryptography\Calais\Readers.
3. Create a new DWORD (32-bit) value.
4. Name it as RetryDeviceInitialize.
5. Double-click it and enter the value as 1.
6. Restart your PC.

The method requires you to make changes to the Registry Editor. Serious consequences can occur if you make changes to the Registry Editor incorrectly. Create a System Restore point before proceeding further.

Press Win+R in combination to open the Run dialog box.

Type Regedit.exe in the empty field of the box and hit Enter.

When the Registry Editor opens, navigate to the following path address –

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography\Calais\Readers.

Switch to the right-pane, right-click and choose New > DWORD (32-bit) value.

Name it as RetryDeviceInitialize.

Double-click the entry to edit its value and in the Edit String Value box that appears enter the value as 1.

Restart your PC.

Following this, the Microsoft Usbccid smartcard reader (WUDF) should start working properly in Windows 10.

Read: Fix Device Not Migrated message.

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