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Modern Warfare - How to Fix Account Registration Error - Login Error 0
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Answer
The account registration error 0 will occur if you attempt to register for an account in the game using an email address that is already tied to an existing Activision account. To resolve this problem, exit the game and relaunch it. The game will then ask you to sign in to your Activision account. Simply log in with the email address that gave you the error. If you don’t remember your password, then visit this page. You will be able to retrieve your forgotten password or change it using your email address.
Retrieve your Activision Forgotten Password
The account registration error 0 will occur if you attempt to register for an account in the game using an email address that is already tied to an existing Activision account. To resolve this problem, exit the game and relaunch it. The game will then ask you to sign in to your Activision account. Simply log in with the email address that gave you the error. If you don’t remember your password, then visit this page. You will be able to retrieve your forgotten password or change it using your email address.
Link your Platform Account to Activision
When you have your credentials available to log in, make sure first to visit this page. Link your account to the platform you are using by logging in with your current account, and under Profile, select Account linking. Link your Playstation, Battle net, Xbox live or other accounts.
Video walkthrough
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