I'm not the administrator of my macbook

Well, today I go to install some updates on my mac and I enter my username and password in and says its incorrect. So, I find out its because I'm not the admin of my macbook. It says "standard". I have no idea how I made this happen but can someone help me?! i've lost all administrator privileges.

Welcome to Mac-forums, Samelson03.

Read Apple's Knowledge Base article on the problem, Mac OS X 10.5: Administrator user changes to standard, it might help you.

Report back to let us know how it goes. Good luck.

I get stuck at the step:

Go to Accounts preferences and check (enable) " allow user to administer this computer" for the affected user.

I go to account preferences and the enable button is grayed out so I can't click it

Which install option did you use to get Leopard on your Mac? Was it the Upgrade option? This has caused a lot of problems from what I've seen.

If you're still under warranty, I would give Apple Care a call or take it back to the store to get it checked. Or I would back up my personal files and do a wipe and install (Erase and Install) of Leopard.

If I do a erase and install option of leopard will that fix the problem?

You stand a better chance of getting a good working Mac on a fresh install, given your situation and the problems Leopard has brought.

Just remember to unplug all unnecessary peripherals before the install and when you restart, install the latest updates: they have fixed a few problems.

While the 10.5.1 install is underway (or any other update for that matter), make sure you have quit all your apps and do not use your Mac, let the install run its course.