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Unknown Device Driver

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Unknown devices show up in the Windows Device Manager when Windows can’t identify a piece of hardware and provide a driver for it. An unknown device isn’t just unknown — it’s not functioning until you install the right driver.

Windows can identify most devices and download drivers for them automatically. When this process fails — or if you disable automatic driver downloads — you’ll have to identify the device and hunt the driver down on your own.

Locate the Unknown Device

RELATED:How to Use the Windows Device Manager for Troubleshooting

You’ll see information about Unknown Devices in the Device Manager. To open it on Windows 10, 8.1, or 8, right-click in the bottom-left corner of the screen or press Windows Key + X and select Device Manager. On Windows 7, press Windows Key + R, type devmgmt.msc into the Run dialog, and press Enter. The Device Manager can also be accessed from the Control Panel or with a search from your Start menu or Start screen.

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You’ll find unknown devices and other non-functioning devices under Other devices. Each device with a problem has a little yellow exclamation mark over its icon.

Such devices will often have the name “Unknown device,” but they’ll sometimes have a more descriptive name. For our purposes, the difference doesn’t matter. Although we may be able to see a name for the device, Windows doesn’t know what it is and we don’t know specifically which drivers we need for it.

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Find the Unknown Device’s Hardware IDs

Now let’s identify the device. Right-click the unknown device and select Properties to view more information.

Other Devices Drivers

Windows will inform you it doesn’t have the appropriate drivers — that’s error code 28.

Click the Details tab, click the Property box, and select Hardware Ids in the list. Windows displays a lot of other information about the device here, but the Hardware Ids will help you identify the device.

You’ll usually see a list of long strings of characters here. Just looking at them won’t tell you much, but they’re actually unique hardware IDs that correspond to the hardware.

Perform a web search for the hardware ID using your favorite search engine. You should find the name of the piece of hardware associated with the unknown device, and that will give you the information you need to hunt down the driver.

Here, we can see that the device is a Nexus 4 or Nexus 7 (2013) with USB Debugging enabled, so we’d need to install the ADB drivers. Windows will then recognize the ADB interface and the device will be a properly installed, “known device.”

Install the Driver

You can now hunt down the driver for the hardware device and install it normally. You shouldn’t have to mess with the Device Manager here — just install the driver using the standard installer and it should work.

If you have to manually install a driver for the device — perhaps the driver is already installed on your system — you can use the Update Driver button in the device’s Properties window. If the device driver is already installed on your system, click the “Browse my computer for driver software” link and choose an installed driver.

Automatically Identify Devices and Install Drivers

RELATED:Should You Use the Hardware Drivers Windows Provides, or Download Your Manufacturer’s Drivers?

Windows attempts to automatically install drivers, searching for appropriate drivers and downloading them from Windows Update. Windows wants to identify hardware and install drivers so you don’t have to do this. If you’ve disabled this feature, you might encounter more unknown devices.

To check whether this feature is enabled or disabled, open the Control Panel and click View devices and printers under Hardware and Sound. Right-click the device that represents your computer itself and select Device installation settings.

Ensure “Yes, do this automatically (recommended)” or at least “Always install the best driver software from Windows Update” is selected. These are the default settings, and allow Windows to download drivers and automatically configure new hardware.

Unknown Device Driver Software For Windows 7

After enabling this setting, click the Update Driver button in a device’s properties window in Device Manager. You’ll be able to search for drivers from Windows Update — this should happen automatically after you connect the device to the PC, but you may want to try it again if you’ve just re-enabled the feature.

Windows Update doesn’t have every driver for every device ever created. You’ll sometimes have to hunt the driver down on your own.

Unknown devices are often a problem after reinstalling Windows on a PC. If Windows can’t find all the drivers for your PC’s hardware, you’ll need to hunt down the drivers and install them yourself. They shouldn’t be a problem later on unless you upgrade your PC’s components or connect more exotic peripherals to it.

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