I installed a MySQL server with installer and it started. After reboot I tried to start it again and get the error:
D:\\Program Files\\MySQL\\MySQL Server 5.
Since you used the Windows installer, everything is set up for you to run MySQL 5.7 as a Windows service, which is a great option in most cases.
Instead of running mysqld.exe from the command line,
mysqld.exe
Win + R
services.msc
MySQL57