Overview:
During the PostgreSQL installation process, it tells me the Account Name is invalid and now I can't install PostgreSQL.
Note: This generally only happens during a 2nd installation of PostgreSQL
Solution:
Run the attached .bat file and continue your installation. .Bat File
OR
Simply change the Account Name to something else:
Maybe: postgres1
Warning!!! Do not change the "Account Domain" under any circumstances.
On later versions of PostgreSQL, you must enter an Account Password to continue the PostgreSQL installation process.