Procedure to resolve Windows 10 Enterprise activation issue due to Microsoft Hotfix KB4493509 impact to IoT Device NMP620-P10
Step 1: Boot up NMP620-P10 and agree to the EULA while creating a User Account. Please disconnect the Ethernet cable and do not connect to Wi-Fi.
Step 2: Left click on the Windows Start button and select Settings.
Step 3: Select Update & Security.
Step 4: Select Windows Update then click on View update history.
Step 5: Click on Uninstall updates.
Step 6: Click on “Security Update for Microsoft Windows (KB4493509)" to highlight it then click Uninstall.
Step 7: Click Yes to uninstall KB4493509.
Step 8: Wait for the uninstall to complete.
Step 9: Click Restart Now when the uninstall is complete.
Step 10: Please wait for the updates to complete. Once logged into the Windows desktop, plug in the Ethernet cable or connect to Wi-Fi with internet access.
Then repeat Step 1 through 3 and select Activation. It should now show that Windows is activated with a digital license.