Well I finally figured it out. I'm aware of the Functions keys on start up, and unfortunately it has nothing to do with that. I've looked into it online and it seems like I'm not the only one having issues (if anyone else running Windows 10) can in fact select/modify their boot device order the old fashioned way in the BIOS setup mode, please feel free to explain and provide screen shots (I know it's asking much but from what I've read I'm def not the only one who noticed this).
When using Windows 10, to set the primary OS and Default OS arrives, you need to go into the settings once your actually logged in. It doesn't go thru BIOS anymore at startup. From what I've read it's a been quite a headache and pissing a lot of people off. This link basically shows the Enterprise users can, however most other regular and pro users can't.
https://answers.microsoft.com/en-us...the-bios/10562f96-f0c0-496e-927e-711dcb0c1938
Again if anyone has actually modified their boot device setup running Windows 10, please feel free to share. I'm running a Dell Optiplex 7020.
Oh and also if you install a new SSD strictly for OS and BI, like many here have, when u install it from the Media USB u make, it gets even weirder.
You'll install it and once it reboots, because the OS is now on both drives it asks you to select which OS you want to use, whoever it doesn't specify which one is on which drive. It gives u volume numbers. Mine used Volume 4 and Volume 6. The only way u can figure out what is what is to pick, sign in, go to My PC and look at the drives. The one with the currently operating OS has the Windows icon on it.
I'll try and post some screen shots of the things I've talked about later tonight when I get home so maybe someone can give a little bit better advice.