What are the security concerns of the following user account setups on a normal Windows 7/8/10 desktop machine compared to: Using a non-privileged account with a password and having an admin account with a different password.
- Using a non-privileged account with a blank password and having an admin account with a password.
- Using an admin account with a password.
- Using an admin account with a blank password.
For the scope of this question it is assumed that: The PC is a private single-user machine behind an usual consumer grade NAT, which is connected to the Internet. All the non-blank passwords are secure and get used for nothing else. No potential attacker has physical access to the machine.