Secure My Windows XP Profile?

I recently received a laptop from my dad after he won it in a raffle at work.
It's a Dell D600 and it's running Windows XP Professional Edition.
It's good so far, I have one account with a password, however my brother can use it just by running Windows in safe mode and changing my password in order to gain access to my computer.
I'm fine with him using it, I'd just prefer him to ask me first. Plus it annoys me that it's so easy to get onto my profile when a password is meant to secure it, not just make someone go the long way around.
I would like to know if it's possible in any harmless way to prevent this from being able to happen.
Thanks :).

Scott P2008-01-07T07:34:09Z

Favorite Answer

If you are the owner of this computer, go to Control Panel > User Management > Your account
Get yourself to be an administrator, change your password
Assign your brother to be a Power User, your brother will not be able to get to your stuff.

Anonymous2008-01-07T07:34:11Z

You can either go to the bios and put a password on your PC or change put a administrator password on the PC it seem like its there your bro is accessing your PC from and making the changes

Anonymous2008-01-07T07:40:05Z

Run the PC in safe mode, login to the "Administrator" account at the top, then see if you can also password protect the administrator account that your brother logs in to.