Try to change a different wireless channel on your router and reset the range extender?

If you connect your PC to TL-WA850RE by a cable, can you access internet? In that case, try to set public DNS: 8. 8. 8. 8 on your wireless network connection for a test.

do you mean TL-WA701ND work as repeater? If it does, just connect your PC to it and try internet. If the cable connection is working, it means repeater is been configured successfully. try to change...

please see the link: http://forum.tp-link.com/showthread.php?17904-300Mbps-N-adapter-only-works-in-54Mbps-G-mode&region=china

Go to Control Panel --- Network and sharing center-- change adapter settings(on the left side) Right click on Wireless network connection --- Status --- Properties Then highlight Client for Microsoft...