The MySQL service does not start after my.ini change

I've installed MySQL 5.7 in Windows 2K8 R2, started, used, and when I change the my.ini file, it no longer starts the service.

I've already returned the defect my.ini file, but it does not start the same way.

I could not understand the newspapers, where is the problem to try other alternatives.

Error 1053 – "The service did not respond to the start or control request"

I've already tried to delete the files: ib_logfile0, ib_logfile1, ibdata1 and $ YOUR_HOSTNAME $ .err, but it did not work either, and they were not recreated.

I have already reinstalled MySQL for the same reason. It worked again, but still gave the problem.

I've already changed the user from the service to an administrator.