I have a situation with the k2 user login, unfortunately the module displays the menu there and already try almost everything someone can explain me how to solve this.

The module has a setting to render a menu for logged in users.
You can disable that option. If you want to change the look & feel you need to address this issue to template developer.

Thanks so much :( I feel Stupid but thanks

You 're welcome :)
No reason to fell stupid Jose.