Well, was the Excel spreadsheet accessible to everyone? If not, this model could work in some strange way - if someone needs access to your computer, they are

Well, was the Excel spreadsheet accessible to everyone? If not, this model could work in some strange way - if someone needs access to your computer, they are provided the password, then it is changed and you and password custodian now have a password not known by everyone else. One side effect of this is that if you know someone else has the password, you're probably very unlikely to do any personal business on that machine.