C:\Users\x_ban>ping -6 ipv6.google.com
Yes I get a response so it looks like my Win 10 box is using IPv4 except when the only option is IPv6.
Pinging ipv6.l.google.com [2a00:1450:4009:804::200e] with 32 bytes of data:
Reply from 2a00:1450:4009:804::200e: time=23ms
Reply from 2a00:1450:4009:804::200e: time=23ms
Reply from 2a00:1450:4009:804::200e: time=23ms
Reply from 2a00:1450:4009:804::200e: time=23ms
Ping statistics for 2a00:1450:4009:804::200e:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 23ms, Maximum = 23ms, Average = 23ms
That will do me thanks, Newt and Steve.