Solution
The process for upgrading the operating system depends on whether your CompactRIO Controller has Microsoft Windows Embedded Standard (WES) or NI Linux Real-Time (LinuxRT) installed.
Windows Targets
Instructions on this process are included in the device's user manual. For example, if you are using the cRIO-9081, there is a section titled Installing an Operating System in the user manual, which outlines the steps.
NI Linux Real-Time Targets
Install the latest version of the CompactRIO Device Drivers compatible with the version of LabVIEW Real-Time installed on your CompactRIO Controller. This should then allow you to upgrade to the latest available firmware for your device.