BFBC2 "Unable to login" when entering serial number

origin battlefield-bad-company-2

Solution 1:

Searching this error message on the EA support center gets me this article. In a nutshell:

  1. Turn off 'remember password' and log in again.
  2. Delete the BFBC2 folder that should be located in your Documents folder and log in again.
  3. Open a ticket if all else fails.

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