5.12 Where is init.m and how to use it?

Possible locations for init.m files include the following:

1. $BaseDirectory/Kernel kernel initialization code for all users
2. $UserBaseDirectory/Kernel kernel initialization code for the currently logged-in user
3. $BaseDirectory/FrontEnd front end initialization code for all users
4. $UserBaseDirectory/FrontEnd front end initialization code for the currently logged-in user

5. I have my init.m in the following folder

   C:\Documents and Settings\All Users\Application Data\Mathematica\Kernel\init.m