3. Debug DNS Issues

Windows 10 aggressively caches DNS with a DNS caching service and can sometimes lead to invalid results. First flush resolver caches and test.

powershell
ipconfig /flushdns
Clear-DnsClientCache

If that does not work, disabling the DNS caching service can be used. Cannot be disabled via services.msc.

After resolving, re-enable the caching service and Reboot.

Reference