USB Unknown Device Drive Issue, Not Working, Recognized or Connected Error After Upgrading and Installing Vista SP1未知设备的USB驱动器的问题，没有工作，承认或连接错误后，升级和安装Vista SP1的

After installing Windows Vista SP1, or more specifically, one of the prerequisite update for the service pack, KB938371, that just been re-released early April after Microsoft claimed already fixed an endless reboot loop issue, USB device may stop working.在安装Windows Vista SP1或更具体地说，一个先决条件更新服务包， KB938371 ，刚刚被重新释放后，四月初微软声称已经固定无休止的重新启动回路的问题， USB设备可能停止工作。 Such USB-based devices involve broad categories, such as mice (mouse), keyboard, external or portable hard disk, USB flash drive, card reader and etc.这种基于USB的设备包括两大类，如鼠（鼠标） ，键盘，外部或便携式硬盘， USB闪存驱动器，读卡机等

In slight different to another USB problem where symptom is在略有不同的另一个USB接口问题，即症状是 Vista unable to find driver for USB device Vista中无法找到驱动程序的USB设备 automatically, the USB connected device not working issue cannot be solved by simply removing and then reinstalling the drivers.自动时， USB连接的设备不工作问题不能得到解决，只需删除，然后重新安装驱动程序。 When plug in an USB device, the USB device is either not detected, not recognized, or not connected.当插入一个USB设备， USB设备都无法检测，而不是公认的，或没有连接。 If Windows Vista tries to install the driver, the USB device is listed as “Unknown Device”, and no driver will be found to install the device, or drive installation fails.如果Windows Vista尝试安装驱动程序， USB设备被列为“未知设备” ，并没有将司机发现，安装设备，或驱动器安装失败。 So the USB device cannot be used as Windows will always ask for driver.因此， USB设备不能被用作Windows将始终要求司机。

Microsoft acknowledges the issue with USB device after installing KB938371 with statement that “We are aware of concerns that a recent Microsoft update may be causing problems with USB devices, according to微软也承认这个问题， USB设备在安装KB938371的声明说： “我们意识到的问题，最近微软更新可能会造成问题， USB设备，根据 TheRegister . 。 We are investigating the matter, and at this time, do not have any information to share.” So there is no official fix from Microsoft yet, other than asking users to check for updated or latest drivers from manufacturer’s websites.我们正在调查此事，并在这个时候，没有任何信息共享。 “因此，没有正式的修复尚未从微软，除要求用户检查更新或最新的驱动程序从制造商的网站。

Although Microsoft hasn’t publish any resolution for USB not working issue after installing KB938271 or Windows Vista SP1 (which must also installed the affected prerequisite update), but尽管微软还没有发布任何决议的USB接口不工作的问题后，安装KB938271或Windows Vista SP1的（这还必须安装了受影响的先决条件更新） ，但 TechNet forum TechNet的论坛 users have manage to fix or resolve the issue with a workaround, which is reported caused by Human Interface Device in combination with update KB938371.用户管理解决或解决问题的替代解决方案，这是报告所造成的人机接口设备，结合更新KB938371 。

1. Go to Control Panel , then go to System and Maintenance , then go to System , and click on Device Manager . 进入控制面板，然后到系统和维护 ，然后到系统，并点击设备管理器。
2. In the Device Manager, expand the tree of Human Interface Devices (HID).在设备管理器，展开树状结构的人机接口装置 （的HID ） 。
3. Update the driver for all Unknown Device .更新驱动程序对所有未知设备 。
4. Windows Vista won’t be able to retrieve any driver online, as expected. Windows Vista将无法找回任何驱动程序在线，符合市场预期。 So when prompted for how to search for driver software, select Browse my computer for driver software .所以，当提示如何搜索驱动软件，选择我的电脑浏览的驱动软件 。
5. Enter or browse to C:\Windows\winsxs as the driver location and press the Next button.输入或浏览到 C ： \ Windows \ winsxs作为司机的位置，然后按下一步按钮。
6. If the system pops up a dialog warning about unsigned driver, allow the driver installation to continue.如果系统弹出一个对话框，警告，未签名的驱动程序，使驱动程序的安装继续进行。
7. Windows Vista with SP1 will install the appropriate driver for the device, and the USB device should be able to work properly again. Windows Vista的SP1也将安装适当的驱动程序的设备， USB设备应能正常工作了。

Note: If the driver cannot be installed, try to boot into Safe Mode and repeat above steps again.注：如果驱动程序无法安装，尝试开机进入安全模式，并重复上述步骤一次。

IMPORTANT : You're reading a machine translated page which is provided "as is" without warranty. 重要：您正在阅读的机器翻译网页这是“原样”提供，无保修。 Unlike human translation, machine translation does not understand the grammar, semantics, syntax, idioms of natural language, thus often produce inaccurate and low quality text which is misleading and incomprehensible.不同人的翻译，机器翻译不明白的语法，语义，句法，成语自然语言，因此，往往产生不准确，低质量的文字这是误导和费解。 Thus, please refer to因此，请参阅 original English article英文原文的文章 when in doubt.当怀疑。

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