i'm having a boot up question. i just formated my computer. The first time you start the system, it asked for your "name" that you like and mine is "mk4". because i'm the only one using the system, i didn't want to type in the password every time i turn on the computer, so i went to "RUN" and type in "control userpasswords2" and uncheck the box "user must enter password..." here come the problem: before, i did the same thing, and everytime i turn on the computer, it logged in under "mk4". but now, everytime i turn on the computer, it logged in under "administration". i did not set any password for admin and mk4. is there anyway to set up the system to log in under "mk4" when i turn on the computer instead of admin.

You need to create a new account in addition to the default administrator account. Make the new user a member of the administrator group. You should also set a password for the default administrator account. That account may save you in the future. To log into safe mode you may have trouble if no password is saved for the default account.

but i already created an account "mk4" and that's admin too. why can i get log in that account everytime i turn on the computer?

You can. Google for auto-logon. Life's more painless for the brainless.

How many accounts do you have?