This is the most intelligible reading question on this I have seen, so I am posting here. Thank Sukant for the well written Question Title. The 4 NameServers for windowsinsder.com are all operational and registered until July 2024: ns-b.pnap.net , ns-c.pnap.net, ns-a.pnap.net, and ns-d.pnap.net
I know updates themselves on mine did not cause an issue as the servers were reachable only a few days ago and I have not had any updates. So, it must be internal.