Force ipv4 ping over ipv6

From elevated CMD:
%windir%\system32\REG.EXE ADD HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters /v DisabledComponents /t REG_DWORD /d 0x20 /f

or

netsh interface ipv6 set prefix ::/96 60 3

netsh interface ipv6 set prefix ::ffff:0:0/96 55 4

---------------------------

Via Windows Registry
We have to modify the Windows IPv6 from the “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\TCPIP6\Parameters\” registry key. The entry we are interested in is named “DisabledComponents”. But the DisabledComponents entry probably doesn’t exist on your system. So we need to create a new dword entry named “DisabledComponents”.

You can now disable IPv6 support by setting the value of DisabledComponents to a hex value of ffffffff (that’s 8 “f’s”). After you reboot, a ping of localhost will return 127.0.0.1, even if you don’t touch the hosts file.