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I want to make 2 'roots' on one computer if that is possible
I am not quite sure that I understand! But users are created with the MySQL server(s), not with clients. I you want to run some client software (such as SQLyog) you can connct to as many MySQL servers as the ROOT-user on each respective server as you want.
I believe you want to install and run a complete server-“lineup” like a webseerver, php and MySQL at a local machine for development. However, then I don't see the problem!
I suggest that you explain more in detail …