I entered XBOX LIVE when he said that an error! What should i do ?

I have another question

Our neighbor got xbox, he rented halo reach, he bought one month xbox live, when trying to join a party with my son he is getting a network error, said .nat error. I went over to his house and he can join a matchmaking session with others but can not join
to our invite. When he entered the match making session it did give him a network error but allowed him to enter the matchmaking session.

Hey when my son went to enter in the code for redeeming GTA it said something went wrong with the error code cv:4C0fzGFekE3C/rqolvfhJW.126 what should I do

Hi there, when I enter the form it’s not letting me as the error message says: The Microsoft account you've entered does not exist.

What should I do now? He’s had this account for a long time and told me that something changed with the password 2 years ago and it has been working but since he got hacked amd changed his account yesterday he can’t get in nor can I reset the password. What can I do now?

i do what said Vibroplex and i download parent profile on xbox, but it dont displayed like my parents profile, and now when dashboard is updated i cant enter to XBOX Live

It wants to agree Terms of Agreement, but i can't, cause when i need to write parents email and pass i get an error

Ok so, i do what you said but i still dosen't show up the new harddrive when i hit the transfer but to find devices to transfer to. When i connect it the other way to the top it says enter serial i do and it says error, still What should i do reset to
factory defaults or something? or see if its a recall?