Can't connect to MySQL server on 'localhost' (10061) after Installation

Question

I installed MySQL using mysql-installer-5.5.20.0.msi on Windows 7. From the cmd window, I run \"mysqlshow -u root -p\". It asked for a password, then return

Answer 1

1. Create the temp folder c:/mysqltmp
2. In my.ini file under [mysqld] add the line tmpdir=c:/mysqltmp
3. Add full privileges to user NETWORK SERVICE for "C:\ProgramData\MySQL\MySQL Server X.Y\Data\ibdata1" file
4. Start service

These are steps for the same problem with MySQL5.7 and MySQL8.0 on Windows 10