I'm afraid it isn't quite that easy. I work in an office with mostly older employees who have zero computer skills. If there's any sort of password prompt when they need to access something on my machine (usually only about once per month), they're going to throw their arms up in the air and have a panic attack.
So ideally I'd like to somehow password protect any changes made from the control panel whilst maintaining an Admin account with no login password. Assuming that's possible.
If you have Vista Business or above, you can enable the Guest account:http://windows.microsoft.com/en-US/wind ... -on-or-off
Basically, it's a standard user account without access to do anything to the system. IIRC it doesn't allow you to create a password.