Disconnect every five minutes

Hi guys, I'm being disconnect almost every five minutes and I get a message like this "Unauthorized software or modifications to your game client has been detected. You will be disconnected shortly." only happens on the WOTLK client, I've already used a process explorer tool to see if the game executable is being injected by some third part software but its not I can only see windows files and the nvidia graphics cards dlls. I don't know what cause this or why, hope someone can help me to fix it, thank you.


process explorer screenshots:
https://imgur.com/qiRlwQo

https://imgur.com/jghQnYh

this problem same like me too, hope someone can help to fix it, thank you.