Do you mean other devices are working properly? If it is, the range extender is working fine and there is no any other settings we can change. You may try to set a different wireless channel on your...

You may go to this link to download the latest firmware: http://www.tp-link.com/en/support/download/?model=TL-WA901ND&version=V2#tbl_j Then refer to this link to upgrade it:...

100+ kilometers? wow, that's a long distance~ Although we can establish the connection at the end, the speed will get very slow. it's not a good method~

Checked this ticket from Dasher: http://forum.tp-link.com/showthread.php?72315-Wireless-extender-restarts-router&region=china It seems you guys have the same thomson tg585 V7 modem router. You guys...

Do you mean TL-WA901ND working as access point mode and the wireless connection doesn't work? If it's working as access point, you may try to change another wireless channel on it. The recommended...

Does your wireless adapter supporting 5G network? If it doesn't, it can't use 5G network.