Hi ,
In windows we do not have SCP/RSYNC utility commands, which helps us to send the archives to remote/slave server.
I hope the below settings will help you while setting replication ..
Primary
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archive_command = 'copy %p \\\\<Slave Server>\\Archive_Location\\%f'
Slave
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trigger_file = 'C:\\.trigger.5432'
restore_command = 'copy \\\\<Slave Server Archive_Location>\\%f %p'
And also, make sure your Primary windows firewall is accepting a connection from the salve server.
Best Regards,
Dinesh