possible to revoke admin priviledges?

I have created another user account but unintentionally have assigned to it administrator priviledges. Is it possible to revoke this account?

 

Yes, as long as it isn't your main admin account, you can either delete it, or change it to a limited account.

I'm assuming you're using Win XP ... Start -> Control Panel -> User Accounts -> Select the Account ... then either change the account type to limited or delete the account

 

And always check if this user has not already created another backdoor account.