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How To Identify Unknown Devices In Your Device Manager

Unknown Device Identifier enables you to identify Unknown Devices with the yellow question mark label in your Device Manager and reports a detailed summary including the manufacturer name, OEM name, device type, device model and even the exact name of the unknown devices. With this information you might contact your hardware manufacturer for support or search the Internet for drivers. Known devices recognized by Microsoft Windows will also be analyzed independent of the operating system.

Supported Operating Systems include: Windows 95, Windows 98, Windows 98SE, Windows Me, Windows 2000, Windows XP, Windows Server 2003, Windows Server 2008, Windows Vista, and Windows 7

  1. Download Now (HTTP) Size: 948KB (971,455 bytes)
  2. When download completes, install Unknown Device Identifier.
  3. Open the Unknown Device Identifier when the installation completes and wait for the program to finish Analyzing all devices on your system.
  4. When the Analysis is complete, find your Unidentified Device in the list of devices.
  5. Click the + sign next to your Unidentified Device, and use the Chip, Vendor and Device information to find and download drivers for your device.

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i re install windows xp to a nec pc but audio driver and ethernet contoller wasn't installed


Install a Device Identify program such as Unknown Device Identifier . After running the program, identify the audio and ethernet devices and go to the manufacturer's website to download the appropriate drivers to a flash drive or CD. Then insert the CD or flash drive in your NEC machine and reboot. The devices are plug and play and should install themselves. If they don't go to the Device Manager and do a Search, choosing the CD or flash drive as the source.

Feb 23, 2011 | NEC Computers & Internet

1 Answer

windows reports that the mscank device is not working properly. How to solve this problem plz. help me in detailed. thanks in advance.


click Start button-Control Panel,System and Security,under System, click Device Manager. Now check if any device has any yellow exclamation mark on it.Once you find any device with any mark, right click on that device click on Uninstalloption,rstart the computer and check if it works.If you are unable to find any device with any marks then check by enabling hidden devices.In the device manager click on View and later click on show hidden devices and check if you find any device with exclamation mark and uninstall it.

Dec 04, 2010 | Computers & Internet

2 Answers

unknown device sm bus controller


What I do in such circumstances is run a little piece of freeware called "Unknown Device Identifier" which does a pretty good job of telling me what device is not working properly, identifying the manufacturer, which allows me to look up the support site and get the driver necessary to correct the problem. I've found that to be the quickest and surest way to resolve such issues.

You can also try double clicking the device in device manager and then selecting "update driver" and see if Windows can locate it on your hard drive or search the internet [providing you have a working connection] to find the appropriate driver and install it. I find it works about half of the time.

There is are other trouble shooting methods and the Microsoft Knowledge base does the most straight forward job of defining them so rather than reinvent the wheel I'll present them as written there:


The main reason for Unknown Device to display in your Device Manager is because you have a device that is not working correctly. To fix this issue, obtain an updated driver for the device.

Use the following methods to enable Windows to recognize your device. Method 1: Windows Update loadTOCNode(3, 'moreinformation'); Visit the following Microsoft Web site to see whether the Web site autodetects an updated driver for your device. Install all recommended drivers. http://www.windowsupdate.com (http://www.windowsupdate.com) Method 2: Download and install the latest driver from the Internet loadTOCNode(3, 'moreinformation'); When you download a driver from the Internet, download the Windows XP version of the driver when multiple Windows versions are listed. Use one of the following options:
  • Visit the Web site of the computer manufacturer if the device came with the computer.
  • Visit the Web site of the device manufacturer if the device was installed after you purchased your computer.
  • Visit the Web site of the device manufacturer if the device was preinstalled on your computer and the computer manufacturer does not have an updated driver.
Look for a Drivers section or a Download section on the manufacturer’s Web site, and search for the device name. Download and install the Windows XP version of the driver. Advanced user section loadTOCNode(2, 'moreinformation'); This section is intended for advanced computer users. If you are not comfortable with advanced troubleshooting, you might want to ask someone for help or contact support. For information about how to do this, visit the following Microsoft Web site: http://support.microsoft.com/contactus (http://support.microsoft.com/contactus) Causes of unknown devices in Device Manager loadTOCNode(3, 'moreinformation');
  • The device does not have a device driver: When a device driver for a device is not available, Device Manager displays the device as Unknown Device and puts it in the Other devices branch. This is very common with universal serial bus (USB) and Institute of Electrical and Electronics Engineering (IEEE) 1394 composite devices. Also, a status of Error Code 1 or Error Code 10 may be displayed when you view the properties of the device in Device Manager.

    Note Most USB and IEEE 1394 devices function correctly without additional device drivers because they are configured by the drivers that are included with Windows for these bus types. However, an additional device driver is needed if the device does not fit the defined and supplied Windows class drivers. If the bus cannot identify the device, it interprets the device as a composite device and then reports it as such in Device Manager.
  • You are using a Microsoft Windows 98 or Microsoft Windows 95 Device Driver: You cannot use virtual device driver (.vxd) files that are common to Windows 98 or to Windows 95 drivers in Windows XP. If you try to install them on your Windows XP-based computer, the device may be listed as unknown in Device Manager. This typically occurs when the device driver manufacturer does not correctly differentiate between the two drivers or assumes that Windows XP can use Windows 98 or Windows 95 .vxd files.
  • Unrecognized Device ID: Every hardware device has a special identifier that is used by Plug and Play. This identifier can include several different types, such as vendor ID, device ID, subsystem ID, subsystem vendor ID, or revision ID. If a device ID is not present, or your Windows XP-based computer does not recognize the device ID, Device Manager may list the device as unknown.

    Note Software programs that require virtual hooks into hardware may create these devices. Additionally, devices that bridge between bus types, such as a device driver that enables a parallel port device to emulate a SCSI or an AT Attachment Packet Interface (ATAPI) bus, are also known to generate an unknown-device response in Device Manager.
  • Faulty Hardware or Firmware: Faulty hardware or firmware may cause a device to be displayed as Unknown Device in Device Manager. Software-only device drivers do not expose a device ID, and there is no standard method for installing these devices. Some manufacturers install the device by using the InstallShield installation program or a similar method. Be aware that software installed by other methods may not be completely removed when the device is removed in Device Manager. Therefore, you may have to check the registry to verify that all entries are removed.

Feb 04, 2010 | Computers & Internet

2 Answers

I am looking for a webcam driver please


The markings you describe are not related to the webcam, they relate to the cord itself. AWM 2464 80 oC 300V means Appliance Wiring Material type 2464, temperature rating 80 degrees, voltage rating 300 volts.
You can use Windows to help identify your webcam so you can find the correct driver, to do this plug in your webcam and turn it on, then go to device manager, if Windows was unable to install a driver automaticaly you should see the webcam listed in device manager with a yellow icon by it and it may say unknown device or the webcam may be in a catagory called unknown devices, once you have located it in device manager double click on it to bring up its properties, click the details tab and use the drop down menu in details to select hardware id's. Copy the hardware id to google search and you should get results there to help you identify your webcam and locate the correct driver.

Jan 12, 2010 | HP Webcam

1 Answer

I need Vista drivers for an Agfa Snapscan 1212U with in/off switch


download unknown device identifier from google and the use device manager find the driver in unknown device identifier and click the plus sign, find the part where it says pnp maximize that and right click then find driver and it will take you to the page.

Apr 14, 2008 | Computers & Internet

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