There is a security lock available in the BIOS, giving password access to Startup and BIOS settings change. However, anyone with some knowledge of hardware can reset the BIOS by opening the computer. But for keeping the normal folks away, it works fine.
Would like to know what I need to do to lock out anyone from using my computer. I don't want them to even be able to get past the window screen without knowing the password. This way, it will be useless for them to even try to use my computer.