Try to enable WLAN Autoconfig and try again. http://www.tp-link.com/en/faq-306.html If it doesn't work, uninstall the driver, uninstall anti-virus software and disable Windows firewall. Later try to...

The rate in utility is not the internet speed but transfer rate between two PA2010 units. 168Mbps is quite normal. The real internet speed is given by your ISP. You'd better test it bypassing...

All TP-LINK powerline adatpers for sale are comaptible with each other. :) Maybe that's why there is no compatibility list.

When connection drops, how about status of all lights on both units in the kit? Did you turn off power-saving mode using the beta tool?...

Yes! TL-WPA281KIT and TL-WPA4220 are compatible with each other but the rate will be limited by PA2010 in the kit.

No such a feature to daily reboot the router.