Disabling IPv6 on Windows 10
1. First, open the registry editor. Press the Win + R key combination, and in the window that appears, enter regedit. Next, click OK.
2. Next, you need to go along this path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\TCPIP6\Parameters
After that, check if there is a DisabledComponents parameter there. If it is not, then create. To do this, right-click on an empty area of the right window, then click New/DWORD (32-bit) value. Give it the name DisabledComponents.
Double-click to open this parameter, and enter ff in Value data. Next, click OK, and close the registry editor.
3. Reboot the computer and you're done. If necessary, you can check the result on any of the sites for checking IPv6.
I hope you succeed. But, if something went wrong, please write in the comments, I will try to help.