|"Im the only account on the computer and it is admin"|
I believe what you're referring to is the Windows accounts, what THX is referring to is the BIOS accounts. The error message you're getting seems pretty clear. You need to enter a BIOS password to enter the supervisor account, you will then be able to change any BIOS setting you want. You are currently entering the BIOS under the user account which allows very few changes. The supervisor password was put in place by someone to prevent BIOS tampering.