This article provides instructions on how to upgrade PXI(e) Controllers to Windows 10 IoT LTSC 21H2 using Windows 10 IoT LTSC 21H2 Field Upgrade Kit (PN 790578-03). You will require your NI PXI(e) controller and the USB flash drive that you received when you purchased the upgrade kit. After following the steps provided, your controller should have its operating system updated.