Most businesses limit end-user’s computer abilities by not allowing them administrator privileges. It is not to stifle work and exercise supremacy. With administrator privileges, you are able to install any program you want whether they are safe or un-safe. It is not always clear what is safe.
A virus that you contract on a computer can only run with the rights of the user you are logged in as. If you are logged in as an admin, that virus can do a LOT of damage. If you aren’t an admin, that virus is limited and easy to remove before it wreaks havoc.
If you require a software installation and it asks you for an administrator password, contact your system administrator.