What are you trying to fulfill? Explain in details. Post screenshots off your configuration.

Any anti-virus software is running on your PC? Disable it and disable firewall as well. Connect your PC and WPA281 by Ethernet cable and try the utility again. If it is the same, there is a second...

You are right... Daylight saving is not supported. There is only DHCP clients list on web interface of W9980 and cannot renane clients.

Sorry but I misunderstand it...in a opposite way... lol

Not sure. The printer works OK when it is connected direclty to your PC? The driver has been installed? There is an instruction and you may follow it to try again....

After power cut-off, you have to reconfigure WR740N to access internet? Did you try to restart it to see if it works? The main router still works after power cut-off? Did you fix a channel for 2.4GHz...