Reports of the Xbox 360’s E74 error have dramatically increased since the release of the New Xbox Experience, according to the results of a poll conducted by ...
If you can’t download the profile on Xbox 360 due to the error codes 8015190A, 80070571, 80070026, 80151103, etc., first of all, check your account subscription ...
before returning it, are you using the Xbox360 in the veritcal position or horizontal? try placing it horizontally and see if you're still getting read errors.