It is not difficult to install it but it seems not quite smooth in your end. Is it stopped in Finish page? Are you connecting to the extender by a cable to install it? Try a different web browser or...

But can the router create a VPN endpoint? Do you mean VPN tunnel or something else? I'm afraid not.

Did you read notes for the latest firmware? David, you have to reset it and manually reconfigure it step by step from the very beginning. For TL-WDR3600 V1 The router will reset after upgrading this...

I don't think the router can make it.

Karl, you'd better report this problem here. http://ticket.tp-link.com/index.php?/Tickets/Submit

Login web interface of WR1042ND and go to DHCP---DHCP Client list to check if Chromecast is showing there. If it does, write down the MAC address. Next, go to Wireless---Wireless Statistics and check...