You can install the driver manually. http://www.tp-link.com/en/article/?faqid=228

Sounds like utility issue. Try to install the driver only manually. The driver can be downloaded on TP-LINK website. http://www.tp-link.com/en/support/download/?model=TL-WN823N&version=V1#tbl_a...

What's the OS? Go to Computer Management---Device Manager---Network Adapters Go to Properties of the USB adatper WN7200. Go to Advanced and check connection speed. Provide a screenshot pls. Besides,...

Did you modify WA850's LAN IP? IP addresses of PCs connected to the root router and extender are in the same subnet? Can you ping each other successfully?

Repeater or bridge with AP are both OK. If you use bridge with AP, you can configure a different SSID and security settings for WA801's own network. That's my simple understanding.

Umm, how did you connect the phone before and after you use WA890EA? WA890EA has been configured and PCs connected to it work OK? Provide more information as below. 1. firmware version of WA890EA. 2....