A little update. In order to get NetTime to work I had to go into Windows Defender and set up an outbound and inbound rule. I had to click on UDP and assign the port as 123. I hope this helps someone with Windows 10.
That is basically step 4 of the guide in the first post of this thread. Only the inbound rule is needed. Outbound rules to explicitly allow certain kinds of traffic are unnecessary unless something has really messed up the default firewall configuration.