steps to neutralize someone who have my WiFi password

[subzer000]

what protection can i take against a not so much experienced (15 kid ) who must have your wifi password , wannabe hacker and using arp spoofing and programs such

wifikill, selfishnet, netcut, wireshark, dumper, jumpstarter, crunch, wpswin, veracrypt, ettercap, hydra

he owns a laptop with windows 8 and Kali Linux on Virtualbox.which i have my hand on now to format and install an OS (is there any restriction i can make or any recommendations you suggest )

My router is a netgear dg84 v3. I know it's very old. can i do something similar to guest network with it ??

what is the must do steps right now ?

i don't want him sniffing everyone traffic and hijacking passwords ,what can i do in my situation other than getting another WiFi connection?.

what the extent of what he can do with such programs ,and does programs such ettercap ,hydra and wireshark works if i enabled the wireless isolation ?

 

[Multipack]

Change the password.

 

[corroded]

If your router has a guest network, put him on it and keep the primary for the "Adults"

 

[Dunlop0078]

Dont let someone who is trying to hack your network have your password, that's ridiculous. Why must this person have your wifi password? By far the most efficient way to solve this is not let them on the network in the first place.

 

[subzer000]

Change the password.

he must have the password that's the problem


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and another q?
when he sniff traffic and passwords does it happen on real time ? or is it stored somehow in the router and he can view it when want ??

 

[ex_bubblehead]

How many times are you going to ask the same question?

Once is enough.

http://www.tomshardware.com/answers/id-3274173/problem-wannabe-hacker.html#19030467