Anti theft device password - for disable timer

Hi,

 

I was locked out of my laptop by the 'disable timer expired' function the other day, and somehow managed to fluke my password. I now want to change that password so that i can enter it into a password manager program I use, in the hope that I never forget it. 

 

Can anyone tell me how I can change the password for my laptop? I see I can change the login password for the website, but I'm guessing that is completely different. 

 

Many thanks,

 

Richard