Good Morning GaneshGandhi1982
Completely frustrated... I've tried DisableOSUpgrade in the Registry Editor / Windows 10 Version 1709. That worked for a short amount of time, until Microsoft launched the 1809.
I've tried changing to a metered connection as per your latest query.
All attempts seem to have no effect to block either 1803 or 1809.
Right now my Dell Dimension (old computer, maybe 14 years) is installing Windows 10 Version 1809 in which in about 2 hours the installation will fail and Windows will reinstall my previous version 1709. It's like Ground Hogs Day, a continuous loop.
Version 1709 functions fine on my Dell Dimension PC.
The problem is my inability to stop system updates.