Does the migrated account have admin permissions? If not you can make it so. Log into the original account of the new computer, go to System Prefs->Accounts, click the padlock and give the admin password. Select the migrated account and click the box to allow the user to administer this computer. Log out, and then log in to the migrated account. Open System Prefs->Accounts again, unlock to make changes, and click on the Login Options at the bottom of the accounts list. At the top select the account to automatically login.
If I were you I would then just use that account, and leave the one the computer came with in place. It does no harm, and it may be useful in the future. If something odd starts to happen in your migrated account, you can log into the Apple installed one and see if everything is normal there. This can help greatly troubleshooting odd little problems that crop up.
Francine
Francine
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