A friend of mine asked me to help him solve this issue.
His Xbox 360 Slim does not let him create profiles. He only has interal storage, and after a factory reset I noticed that a profile and an item under System Items, in Storage, shows as corrupted.
He told me he got this error code before: 8007 2F76.
Whenever he tries to create a profile, the console simply asks for the profile name again, no error message (such as "profile name must start with a letter", or any other).
We tried resetting, formatting, clearing the cache five or six times, turning it off, manually deleting the files, and nothing works.
Do you suggest anything else we can do, or have a definitive solution? It may take some time to reply, because I'd give him the instructions so he could try on his home, but we'll manage.
Thank you in advance!