How To Install Keyspan USA-19HS Driver On Windows Easily

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Published on October 9, 2025

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Installing the correct driver for your Keyspan USA-19HS adapter on Windows is crucial for ensuring it functions properly. This adapter, often used for serial-to-USB connections, can sometimes present challenges during the installation process. This guide provides a step-by-step approach to successfully install the Keyspan USA-19HS driver on your Windows system.

Whether you’re dealing with an older device or simply need to reinstall the driver, following these instructions will help you avoid common pitfalls and get your Keyspan USA-19HS adapter up and running quickly. Let’s explore the process to make this installation as smooth as possible.

How Do I Install the Keyspan USA-19HS Driver on Windows?

Step 1: Download the Correct Driver

First, you need to identify and download the appropriate driver for your version of Windows. Visit the Keyspan support website or a trusted driver download site.
Ensure the driver is specifically designed for the Keyspan USA-19HS adapter and compatible with your operating system (e.g., Windows 10, Windows 11, etc.).
Download the driver installation package to a location on your computer that is easy to find, such as your Downloads folder.

Step 2: Extract the Driver Files

Once the download is complete, locate the downloaded file. It will likely be a compressed file (ZIP).
Right-click on the ZIP file and select “Extract All…” to extract the contents to a new folder.
Choose a destination for the extracted files, or accept the default location.

Step 3: Initiate Driver Installation Through Device Manager

Open Device Manager. You can do this by searching for “Device Manager” in the Windows search bar.
In Device Manager, locate the Keyspan USA-19HS adapter. It might be listed under “Other devices” or as an “Unknown device” with a yellow exclamation mark.
Right-click on the Keyspan USA-19HS adapter and select “Update driver.”

Step 4: Manually Install the Driver

In the “Update Drivers” window, select “Browse my computer for drivers.”
Click the “Browse…” button and navigate to the folder where you extracted the driver files in Step 2.
Make sure the “Include subfolders” box is checked, then click “Next.”

Step 5: Complete the Installation

Windows will now attempt to install the driver. Follow any on-screen prompts.
If prompted to install an unsigned driver, choose to proceed with the installation. This is sometimes necessary for older drivers.
Once the installation is complete, you should see a message indicating that the driver has been successfully installed.

Step 6: Verify the Installation

In Device Manager, check if the Keyspan USA-19HS adapter is now listed correctly under the appropriate device category (e.g., Ports (COM & LPT)).
Ensure there are no error symbols (yellow exclamation marks) next to the device.
Test the adapter with the device it is intended to connect to, to ensure it is functioning properly.

Tips for a Smooth Installation

Run the installer as administrator: Right-click on the driver installation file and select “Run as administrator” to ensure that the installer has the necessary permissions.
Disable driver signature enforcement: For older drivers, you may need to temporarily disable driver signature enforcement in Windows. Be cautious when doing this, and re-enable it after the installation is complete.
Check compatibility mode: If you’re using an older driver, try running the installer in compatibility mode for an older version of Windows.

Driver Installation Made Easy

Installing the Keyspan USA-19HS driver on Windows doesn’t have to be a headache. By following these simple steps, you can ensure your adapter is correctly installed and ready to use.

FAQ

Where can I download the Keyspan USA-19HS driver? You can download the driver from the Keyspan support website or a trusted driver download site.

What if Windows cannot find the driver automatically? You may need to manually browse to the folder where you extracted the driver files in Device Manager.

How do I know if the driver is installed correctly? Check Device Manager to see if the Keyspan USA-19HS adapter is listed correctly without any error symbols.

What do I do if I get an error message during installation? Ensure that you have the correct driver for your version of Windows and that you are running the installer as administrator.

Comparing Driver Installation Methods

Method	Ease of Use	Requires Manual Steps	Best For
Automatic Update	Very Easy	No	When Windows can find the driver online
Manual Installation	Moderate	Yes	When you have the driver files

Keyspan Driver Success

With the right driver in place, your Keyspan USA-19HS adapter will perform optimally, enabling seamless communication between your serial devices and your Windows computer.