Download and install National Instruments USB-9421 driver

USB-9421 is a DAQ Device hardware device. This Windows driver was developed by National Instruments. The hardware id of this driver is USB/VID_3923&PID_709F&REV_0100; this string has to match your hardware.

1. Manually install National Instruments USB-9421 driver

1. You can download from the link below the driver installer file for the National Instruments USB-9421 driver. The archive contains version 22.5.0.49248 released on 2022-07-07 of the driver.
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3. Start the driver installer file from a user account with the highest privileges (rights). If your User Access Control (UAC) is running please confirm the installation of the driver and run the setup with administrative rights.
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5. Follow the driver setup wizard, which will guide you; it should be quite easy to follow. The driver setup wizard will scan your PC and will install the right driver.
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7. When the operation finishes restart your PC in order to use the updated driver. As you can see it was quite smple to install a Windows driver!
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This driver is not digitally signed.

This driver received an average rating of 3.5 stars out of 12982 votes.

2. How to install National Instruments USB-9421 driver using DriverMax

The advantage of using DriverMax is that it will install the driver for you in just a few seconds and it will keep each driver up to date, not just this one. How can you install a driver with DriverMax? Let's follow a few steps!

1. Open DriverMax and click on the yellow button named ~SCAN FOR DRIVER UPDATES NOW~. Wait for DriverMax to scan and analyze each driver on your PC.
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3. Take a look at the list of available driver updates. Search the list until you locate the National Instruments USB-9421 driver. Click the Update button.
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5. That's it, you installed your first driver!
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