Xbox360 query - profile linked to another profile

If your xbox360 starts up follow the guide in the Link previously provided

I'll try it. Interesting feedback.

Thank you for your time on my topic

I still use my Hotmail.com email even under Outlook.

However, there was an issue several years ago, that if you used your account only for Xbox, and didn't sign in regularly at least once during a certain time (I think it was 1 year or something like that) with your account on the actual Live service (like
your Hotmail email account), the Microsoft Account would be deleted, and the Gamertag you had would be in some kind of Limbo, where it still exists online, but isn't attached to a Microsoft Account.

If you create a new account, all your game progress on the old account and your past purchases will be lost!

In your case I'd try to contact the official support, and have them check if that happened to you (i.e. your existing Gamertag is now stuck with a Microsoft Account that was deleted because of inactivity), and have them try to attach your Gamertag to your
new Microsoft Account you created on Outlook.

You can contact the official support through
https://support.xbox.com/contact-us

There click on "My Account" (or "Mon Compte" in French), and if a box with a virtual agent shows up, click on "No Thanks..."

Then click Manage Account (or Gérer un compte), and then at the bottom of the page click on the "afficher les moyens de contact" button.

That should make several tiles appear where you can then (depending on times of day and times of operation of the support in your country) either chat with support or have them call you back.

Yep, i tried but not accepted.

Says something like "impossible .... bla bla bla ...reserved domain" with hotmail.com marked in red ...

With the outlook email, i can sign in, but this account is empty ...

Did your change your email address that everything got reset?