Windows 10: Is my BIOS all UEFI (proud) or some kind of mix (embarrassed)?

Although I have a hundred things to do around the apartment, I decided to prioritize by checking my BIOS. I would like to know if my settings are 100% UEFI or whether the machine is actually booting Legacy without telling me.

Start - I have a Dell Optiplex 7010 Desktop with 16GB RAM dual-booting Win 7 Pro SP1 64-bit and Win 10 Pro 64-bit. (The Win 10 side was originally 8, then 8.1, then 10. The 10 had lots of Event Viewer errors, so I "clean" reinstalled the 10 with a USB drive. On both the 7 and 10 sides, my sfc /scannows now run clean.)

Here's what the BIOS says:

General - System Information: The BIOS is A20 (the latest).
General - Boot Sequence: Boot Sequence: Windows Boot Manager is checked, and it says "Windows Boot Manager".
Boot List Option: UEFI is selected. If I hit "View" on the right, nothing happens.
General - Advanced Boot Options: Enable Legacy Option ROMs is checked. (I wonder what would happen if I UNchecked this.)
System Configuration - SATA Operation: AHCI is checked.
Secure Boot - Secure Boot Enable: Secure Boot is DISabled. (I have NO desire to change this.)
Virtualization Support - Virtualization: Enable Intel Virtualization Technology is checked.
Virtualization Support - VT for Direct I/O: Enable VT for Direct I/O is checked.
Virtualization Support - Trusted Execution: Trusted Execution is NOT checked.

So - what am I? 100% UEFI or some sloppy Legacy mixed in?

What happens if I UNcheck General - Advanced Boot Options: Enable Legacy Option ROMs ?

What difference would unchecking that make anyway?

Why doesn't Dell publish something that actually explains all of this confusion? At least in Tagalog, which some unemployed American could translate into English.

:)

 

New motherboard will not reconize my existing hardrive and OS

Hi,

I didn't spend a lot of time reading the other replies, and hope no one is offended if this suggestion was already provided...

Look in your BIOS to determine whether it is set for UEFI or Legacy BIOS, then verify that your HDD is Initialized as a GPT for UEFI Bios, or MBR for Legacy Bios...

They don't mix and match well...

Your HDD most likely won't show up in the Boot Settings in your UEFI BIOS...

If it does, that is most likely not the setting you want to choose..

For UEFI Bios you need to set your HDD\SSD Boot Device to "Windows Boot Manager"... Which is on the 150MB or so EFI Partition...

 

Unable to boot windows 10 outside of safe mode unable to restore

Hi,

There may be some issues with your BIOS and then installation method you are using...

If this is a modern machine that uses UEFI Bios, there are specific ways to install windows that are different than with the previous type BIOS...

For starters, the drive needs to be initialized as a GPT drive for UEFI, and MBR drive for the older BIOS... If that setting is wrong it probably won't even install and give some type of drive error...

Then there is the USB... kind of the same thing... To install Win 10 on UEFI BIOS the Flash Drive needs to be formatted FAT32...

To install on a legacy BIOS it needs to be formatted NTFS... The Win 7 USB\DVD Tool creates this type of flash drive...

You would need to use a program something like RUFUS to create a Flash Drive for the UEFI BIOS...

The flash drive needs to be Initialized GPT and Formatted FAT32...