If the driver was not installed, remove the Serial adapter then run 'PL2303DriverInstaller.exe' again. Follow directions in Device Manager to download the correct driver. The three solutions listed in this article have proven to be quite helpful in fixing a Prolific USB to Serial driver not working on Windows 10.
This tiny driver utility quickly searches your system for connected hardware. It identifies many different connected devices and also includes hardware which has been marked as 'Unknown' in the device manager.
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It gives you a little bit more information about a certain device so that you can find the proper drivers required to get it up and going in Windows.
Unfortunately when we tested an older scanner we thought was heading to the dustbin, it was configured that our old scanner would probably never work any newer version of Windows.
In short, this is a small tool which may help you figure out whether there are drivers available for your potentially outdated device.
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Good luck!
Features and highlights
- Identifies USB 1.1/2.0/3.0 devices
- Identifies IEEE 1394 devices
- Identifies ISA Plug&Play devices
- Identifies AGP Bus devices
- Identifies PCI, PCI-E, eSATA devices
- Find drivers for hardware devices
- Contact hardware vendor directly from app
Unknown Device Identifier 9.01 on 32-bit and 64-bit PCs
This download is licensed as freeware for the Windows (32-bit and 64-bit) operating system on a laptop or desktop PC from drivers without restrictions. Unknown Device Identifier 9.01 is available to all software users as a free download for Windows.
Filed under:- Unknown Device Identifier Download
- Freeware Drivers
- Driver Identifier Software
If you see a yellow exclamation mark next to one of your PCI drivers listed under Other devices or Unknown devices in the Device Manager, and you have no idea what to do, you’re not alone. Many Windows users are reporting about this problem. But no worries, it’s possible to fix, however horrifying the scene looks.
Here are 3 solutions for you to choose.You may not have to try them all; just work your way down until you find the one works for you.
What is PCI device driver?
PCI stands for Peripheral Component Interconnect. The PCI device you see in Device Manager indicates the piece of hardware that plugs into your computer’s motherboard, such as PCI Simple Communications Controllers and PCI data Acquisition and Signal Processing Controller as shown in the above screen shot. These are the hardware devices that keep your PC running smoothly.
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If these device drivers fail to work properly, your PC suffers.
How do I fix it?
Note: The screen shots below are shown on Windows 7, but all fixes apply to Windows 10 and Windows 8 as well.
Method 1: Update PCI device driver via Device Manager
Method 2: Update PCI device driver Manually
Method 3: Update PCI device driver Automatically (Recommended)
Method 1. Update PCI device driver via Device Manager
The yellow exclamation mark next to certain device problem can usually be fixed with an appropriate and matched device driver.
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1) On your keyboard, press the Windows logo key and R at the same time, type devmgmt.msc and press Enter.
2) If you can see clearly the name of the PCI device as the screen shot shown below (PCI Simple Communications Controller), just go to the manufacturer website of your computer and search for the exact driver from there.
If the computer is assembled by yourself, which means that there is not a definite manufacturer that you can turn to, you can use Driver Easy to help you download the drivers needed for free.
Method 2. Update PCI device driver Manually
If you are not sure which manufacturer website to turn to, you can use the hardware ID to search for the correct driver for you:
1) On your keyboard, press the Windows logo key and R at the same time, type devmgmt.msc and press Enter.
2) Expand Other devices. Double-click PCI Device.
3) Go to Details, select Hardware Ids from the drop-down box.
4) Now, let’s try the first ID listed here first. Copy the first hardware ID listed.
5) Paste it to the search box of the searching engine. Please also add key words such driver or your operating system.
6) Download the correct driver from the list provided. Then you need to install them as instructed by the driver provider.
Method 3. Update PCI Driver Automatically (Recommended)
If you don’t have the time, patience or computer skills to update your drivers manually, you can do it automatically with Driver Easy.
Driver Easy will automatically recognize your system and find the correct drivers for it. You don’t need to know exactly what system your computer is running, you don’t need to risk downloading and installing the wrong driver, and you don’t need to worry about making a mistake when installing.
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You can update your drivers automatically with either the FREE or the Pro version of Driver Easy. But with the Pro version it takes just 2 clicks (and you get full support and a 30-day money back guarantee):
1) Downloadand install Driver Easy.
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2) Run Driver Easy and click the Scan Now button. Driver Easy will then scan your computer and detect any problem drivers.
3) Click the Update button next to the flagged PCI device to automatically download and install the correct version of its driver (you can do this with the FREE version).
Or click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system (this requires the Pro version– you’ll be prompted to upgrade when you click Update All).
We hope this post can meet your needs. If you have any questions or suggestions, feel free to leave comments below. It would be very nice of you if you are willing to click the thumb button below.