you can contact TP-LINK support,they can help,and they can offer replacement if the problem can not be solved

as I know,the transmit power is Meeting Standards ，it will not do harm to your health, the router's transmit power is much leeeeeesssssss than your mobile phone. people normally like strong wifi...

sorry to tell you that 810N do not support what you want ,you can chose to return it or just use the repeater mode

if you forget the router's manage psw you can reset it ,but forget windows psw I think you should better contact Microsoft rather than TP-LINK

Hi, the extender do not support enterprise encryption，it is what the school wifi used according to your description.