I have forgotten password 2 asp.net machine account, how do i get rid of it without a password?

I have an asp.net machine account, I have forgotten the password. Now, I cannot update my pc and right now I do not have the money to see a computer specialist. How can I get rid of it without knowing the password?I have forgotten password 2 asp.net machine account, how do i get rid of it without a password?
Go to http://peterkellner.net/2007/02/15/reset鈥?/a> and follow the directions.