It's a fresh new install with a clean database.
I checked the values from Magento 2 : Error 404 not found at magento 2 admin login page and it's fine too.
Also tried to access it via /index.php/admin as suggested by All of the buttons/links including admin login shows error 404 not found 1, how to fix this problem? but still not found.
During the setup process, I specified "admin" as url.
Front end is working.
Someone can help?
Best Answer
I have faced the same problem.
Then I solved it just adding the .htaccess file in root folder.
.htaccess code