Windows XP system installation unknown device failed reason

                  This article mainly shares with you the reason why the Windows XP system fails to install unknown device. First, what is the meaning of Unknow Device? As the name implies, it means an unknown device. That is to say, Windows recognizes that there is a device connected to the computer, but Windows cannot identify which device it is. For example, sometimes insert a USB flash drive to the computer, but due to problems with the USB flash drive or USB interface, Windows will not recognize the USB flash drive, and then UnkownDevice will be reported. It's not that Windows doesn't have a driver. If a device that Widnows can identify without problems is connected to the computer and there is no driver installed, widnows will prompt you to install the driver for this device.

Many computer novice users are looking for the unknown device driver download address when encountering this problem. In fact, the unknown device driver is an unrecognized drive. It is not the name of a driver. If Windows XP installs unknown device, you can refer to the following method. .

Symptoms

When installing the driver, the message ““unknown device” appears when the USB cable is connected to the computer. The cause of the problem is that the computer motherboard cannot correctly recognize the USB 2.0 mode and the USB cable has a problem.

Windows XP installation unknown device failed Solution 1:

Step 1: Disable USB 2.0 controller

In the Windows XP operating system, click “Start&rdquo ;→“Control Panel”→“Performance and Maintenance”→“System”. In the Windows Vista operating system, click “Start( )”→“Control Panel”→“Performance and Maintenance&&quo;→“System”→“Device Manager”.

in the & ldquo; device manager & rdquo; window, expand & ldquo; Universal Serial Bus Controller & rdquo; primary item, click & ldquo; USB2 Enhanced” subkey.

Note: This article uses the Intel (R) 82801 motherboard chipset as an example. The operation methods of other manufacturers' chipsets can be used as a reference. In the <;Device Manager" window, click “Actions"→“Disable”.

Note: If you are using a USB keyboard and mouse, you need to use the keyboard and mouse of the PS/2 interface first, so that you can't use it after disabling the USB 2.0 controller. These devices.

in the & ldquo; Intel (R) 82801EB USB2 Enhanced Host Controller - 24DD & rdquo; window, click & ldquo; is & rdquo; button.

Once you have finished deactivating the USB 2.0 controller, you should be able to recognize the printer correctly.

Step 2: Detect USB cable

It is recommended to use the HP original USB cable or use a USB cable with a shield ring that is no longer than 1.5 meters.

Step 3: Check the computer motherboard. It is recommended to update the USB 2.0 controller driver of the computer motherboard, or try to use other chipsets to install the printer driver.

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Step 4: When trying to add a printer driver fails to install or fails to install, you can install the driver by adding a printer.

Windows XP installs unknown device failure solution 2:

Unknown Device Identifier is a professional hardware device detection tool. It recognizes a variety of hardware devices on the PC, including built-in hardware and a variety of plug-and-play devices. By scanning, all original equipment manufacturer names, device types, device models, and even unknown devices (some devices that display yellow question marks in the device manager) can be seen at a glance.

Computer hardware detection can identify tens of thousands of USB 1.1/2.0 devices, IEEE1394 devices, ISA bus plug-and-play devices, identify almost all PCI and AGP bus boards (including main version integration) device. The detection method provided by the hardware wizard is independent of the operating system and can also be used to identify the “unknown device” marked with a yellow question mark in the device manager. The hardware sprite test results include device manufacturer, device type, hardware version, chip manufacturer, chip/chipset model, OEM manufacturer and other information.

Find the driver installation of Unknown Device through the hardware wizard to solve the problem.