Posted 26 April 2005 - 08:19 AM
In most cases the Administrator account is not the primary (default) account. That is if using fast user switching, Administrator is not shown as an option by default and if using standard login Administrator is not the login name by default. Often the administrator password on XP machines that have been built for a single user will be blank or simply 'password'. (This is the way I set up machines when they are for simple home users)
If using fast user switching, booting in safe mode (press f8 during boot to display options) will display 'Administrator' as a clickable user choice. Then try a blank password, or 'password' and see if you are lucky.
If using classic standard login, type Administrator as the user name and then try blank or password as above.
Presumably since you have been given this machine, there is nothing of importance to you on it, so if all else fails, format and reinstall XP and choose your own password ;)