A library of over 250,000 device drivers, firmware, BIOS and utilities for Windows. All this devices use a PL2303 to provide a connection to an USB port, but inside, they are RS232-like interface build (and appear as a COM port in your operating system). When you plug the device into USB, it is well recognized by W10 and it try to load the Prolific driver.
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Do you see a yellow mark in Device Manager? This is a common problem, and in this guide, we'll help you troubleshoot and resolve the issue on Windows 10.
On Windows 10, sometimes, Device Manager will show a device with a yellow exclamation mark. When this happens, it indicates that the system has encountered a problem with that particular piece of hardware.
Although the yellow warning sign doesn't reveal the issue, it does tell you that Device Manager has generated an error code, which you can verify to determine the reason. Usually, it comes down to a hardware conflict of some sort, or missing or not correctly installed the driver.
In this Windows 10 guide, we'll walk you through the steps to resolve the yellow exclamation mark on a component in Device Manager.
How to fix yellow exclamation mark in Device Manager
If you're dealing with a yellow warning sign on a piece of hardware connected to your computer, you first need to determine the reason for the error and then troubleshoot the problem.
Confirm the problem
To determine the cause of the yellow exclamation mark, use these steps:
- Open Start.
- Search for Device Manager and click the top result to open the console.
Double-click the device with the yellow exclamation mark.
© Provided by Windows Central- Click the General tab.
Under the 'Device' status, confirm the problem. For example, 'The driver for this device are not installed (Code 28).'
© Provided by Windows Central
Once you complete the steps, you'll have an understanding of the problem with the hardware.
Uninstall device driver
If the problem is related to a driver not working correctly, before installing an updated version, you can remove it and let Windows 10 detect it again to see if that fixes the error.
To remove a device driver, use these steps:
- Open Start.
- Search for Device Manager and click the top result to open the console.
Right-click the device with the yellow exclamation mark and select the Uninstall device option.
© Provided by Windows CentralClick the Uninstall button.
© Provided by Windows Central- Restart the computer.
After you complete the steps, Windows 10 will reinstall the driver automatically, solving conflicts and other errors.
If you continue to see the error in Device Manager, you want to update the driver to the latest version to resolve the issue with the instructions below.
Update driver using Settings
If the device shows a yellow mark, reads 'Unknown device,' and it's listed under the 'Other devices' list, installing the latest device driver through Windows Update may resolve the issue.
In the past, you're able to download drivers using Windows Update directly from the Device Manager, but this feature is no longer available. You now need to use the Windows Update settings from the Settings app.
To update a device driver to resolve the yellow exclamation mark on Windows 10, use these steps:
- Open Settings.
- Click on Update & Security.
- Click on Windows Update.
Click the View optional updates option (if available).
© Provided by Windows Central- Click on Driver updates.
Select the driver for the device with the yellow mark.
© Provided by Windows Central- Click the Download and install button.
Once you complete the steps, the latest version of the driver available through Windows Update will install, and the yellow exclamation mark problem should no longer appear in Device Manager.
Update driver using Device Manager
If the optional updates link is missing, then it means that Windows Update doesn't have any updates for your hardware configuration. In this case, you'll need to download the latest drivers from your manufacturer support website and follow their instructions to complete the installation.
However, you can use these general steps if the manufacturer doesn't provide any guidance:
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- Open Start.
- Search for Device Manager and click the top result to open the console.
Right-click the device with the yellow exclamation mark and select the Update driver option.
© Provided by Windows CentralClick the Browse my computer for drivers option.
© Provided by Windows CentralClick the Browse button.
© Provided by Windows Central- Select the extracted folder containing the driver update.
- Check the Include subfolders option.
- Click the Next button.
- Click the Close button.
After you complete the steps, the driver will install, and the exclamation mark should disappear from the Device Manager.
If it's unclear whether you need to install the driver, either use your computer model information to find the driver in the manufacturer support website. Sometimes, companies like Dell provide a tool that can automatically scan, detect, and install the necessary drivers. If the tool isn't available and the device shows up an unknown, inside the device properties, in the 'Details' tab, you can grab the hardware id to search online and determine the driver you need.
More Windows 10 resources
For more helpful articles, coverage, and answers to common questions about Windows 10, visit the following resources:
If your computer doesn't recognize your connected device, you might see an unknown error or a '0xE' error. If you do, follow these steps and try to connect your device again after each step:
- Make sure that your iOS or iPadOS device is unlocked and on the Home screen.
- Check that you have the latest software on your Mac or Windows PC. If you're using iTunes, make sure you have the latest version.
- Make sure that your device is turned on.
- If you see a Trust this Computer alert, unlock your device and tap Trust.
- Unplug all USB accessories from your computer except for your device. Try each USB port to see if one works. Then try a different Apple USB cable.*
- Restart your computer.
- Restart your device:
- Try connecting your device to another computer. If you have the same issue on another computer, contact Apple Support.
For more help, follow the steps below for your Mac or Windows PC.
* Learn how to connect iPad Pro (11-inch) or iPad Pro 12.9-inch (3rd generation) to your computer.
If you use a Mac
- Connect your iOS or iPadOS device and make sure that it's unlocked and on the Home screen.
- On your Mac, hold down the Option key, click the Apple menu, and choose System Information or System Report.
- From the list on the left, select USB.
- If you see your iPhone, iPad, or iPod under USB Device Tree, get the latest macOS or install the latest updates. If you don't see your device or still need help, contact Apple Support.
If you use a Windows PC
The steps differ depending on if you downloaded iTunes from the Microsoft Store or from Apple.
If you downloaded iTunes from the Microsoft Store
Follow these steps to reinstall the Apple Mobile Device USB driver:
- Disconnect your device from your computer.
- Unlock your iOS or iPadOS device and go to the Home screen. Then reconnect your device. If iTunes opens, close it.
- Click and hold (or right-click) the Start button, then choose Device Manager.
- Locate and expand the Portable Devices section.
- Look for your connected device (such as Apple iPhone), then right-click on the device name and choose Update driver.
- Select 'Search automatically for updated driver software.'
- After the software installs, go to Settings > Update & Security > Windows Update and verify that no other updates are available.
- Open iTunes.
If you downloaded iTunes from Apple
Follow these steps to reinstall the Apple Mobile Device USB driver:
- Disconnect your device from your computer.
- Unlock your iOS or iPadOS device and go to the Home screen. Then reconnect your device. If iTunes opens, close it.
- Press the Windows and R key on your keyboard to open the Run command.
- In the Run window, enter:
%ProgramFiles%Common FilesAppleMobile Device SupportDrivers
- Click OK.
- Right-click on the
usbaapl64.inf
orusbaapl.inf
file and choose Install.
You might see other files that start withusbaapl64
orusbaapl
. Make sure to install the file that ends in .inf. If you’re not sure which file to install, right-click a blank area in the File Explorer Window, click View, then click Details to find the correct file type. You want to install the Setup Information file. - Disconnect your device from your computer, then restart your computer.
- Reconnect your device and open iTunes.
If your device still isn't recognized
Check Device Manager to see if the Apple Mobile Device USB driver is installed. Follow these steps to open Device Manager:
- Press the Windows and R key on your keyboard to open the Run command.
- In the Run window, enter
devmgmt.msc
, then click OK. Device Manager should open. - Locate and expand the Universal Serial Bus controllers section.
- Look for the Apple Mobile Device USB driver.
If you don't see the Apple Mobile Device USB Driver or you see Unknown Device:
- Connect your device to your computer with a different USB cable.
- Connect your device to a different computer. If you have the same issue on another computer, contact Apple Support.
If you see the Apple Mobile Device USB driver with an error symbol:
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If you see , , or next to the Apple Mobile Device USB driver, follow these steps:
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- Restart the Apple Mobile Device Service.
- Check for and resolve issues with third-party security software, then restart your computer.
- Try to install the
usbaapl64.inf
orusbaapl.inf
file again.