When working with sophisticated testing and measurement equipment like the Fluke MDA-550 Series III Motor Drive Analyzer, Fluke 190 Series III ScopeMeter®, Fluke 430 Series II, or Fluke 1735 Three-Phase Power Quality Logger ensuring seamless integration with your computer systems is crucial. However, users may encounter a common hurdle where their Windows 10 or Windows 11 machine fails to recognize the device, even after manually installing the USB driver as per the Fluke-190 Series II guide. This article provides a simple yet effective solution to this issue.

The Solution

The key to resolving this recognition issue is adjusting a specific security setting within Windows known as "Memory Integrity." By disabling this feature, users have reported successful recognition of their Fluke devices by the PC.

Step-by-Step Guide

1. Navigate to Core Isolation Settings: Open the Core isolation page by clicking on "Start" > "Settings" > "Update & Security" > "Windows Security" > "Device Security."
2. Access Core Isolation Details: Under the "Core isolation" section, click "Core isolation details."
3. Disable Memory Integrity: Locate the "Memory Integrity" setting and toggle it off.
4. Restart Your Computer: Windows will prompt you to restart your computer to apply the changes. Proceed with the restart.
5. Update the Driver: After the system restarts, open "Device Manager" and check for the Fluke device. If detected, proceed to update the driver accordingly.

Conclusion

Following the above steps, users can overcome the device recognition and fully utilize their Fluke Test Tools with their Windows 10 or Windows 11 machines. This simple tweak can save time and frustration, ensuring a smoother workflow and reliable performance from your Fluke equipment.

Important Note: IT Security and Re-Activation.

Disabling "Memory Integrity" may affect certain Windows security features. Before making such changes to your system settings, consult with your IT department or a professional.
Memory Integrity cannot be re-activated while the driver changes are active. However, if the drivers are uninstalled, Memory Integrity can be successfully re-activated.

When selecting the slider to turn Memory Integrity back on, the feature will first check for driver compatibility. If the affected Fluke drivers are still installed on the PC, this process will fail, and a pop-up warning will appear in the bottom right-hand corner of the screen.

The option to “review incompatible drivers” will appear, and selecting this will provide a list of the drivers that are preventing the feature from being re-enabled.

The best way to remove the drivers is to have the associated Fluke product plugged in, and to find it in the Device Manager. Right-Click the device, and select "Properties"; there is a “Uninstall Device” option in the "Driver" tab.

Make sure to select “Attempt to remove the driver for this device" in the new window that appears.

Even after the successful uninstallation of the device and drivers, a PC restart will likely be required.
In addition, in our testing we have found that it takes some time before the Memory Integrity option accepted that the appropriate changes had been made and could be re-activated. If Memory Integrity does not allow re-activation right away, try letting a few hours pass and try again.