Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Is my BIOS all UEFI (proud) or some kind of mix (embarrassed)?

10 Oct 2015   #1

Dual boot - Win 7 Pro 64-bit and Win 10 Pro 64-bit
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.

My System SpecsSystem Spec
10 Oct 2015   #2

Win-7-Pro64bit 7-H-Prem-64bit

My System SpecsSystem Spec
10 Oct 2015   #3

Dual boot - Win 7 Pro 64-bit and Win 10 Pro 64-bit

Pin - Thanks for the link. But I'm still mystified.

I think my most important question is: What happens if I UNcheck General - Advanced Boot Options: Enable Legacy Option ROMs ?
My System SpecsSystem Spec

10 Oct 2015   #4

Win-7-Pro64bit 7-H-Prem-64bit

I don't know why you would keep everything on default no need to create issues

But if I understand what he said I believe you would not be able to install win-7
Not sure if it would effect a current install or just future abilities to install non uefi bios os's :/
Which ahci is uefi compatibility mode allowing legacy installs

So you would be running in uefi only install mode instead I believe.
My System SpecsSystem Spec

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

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar help and support threads
Thread Forum
BIOS MB & UEFI MB Installation
I have an SSD System Drive which contains Win 7 64bit Professional OS and all of my Programs, which was built on a GB BIOS MB, so has MBR Boot Sector. I wish to transfer this SSD, complete as is, to a new GB MB which has UEFI Boot Sector and then install Chipset Drivers. a) Is this idea sound....
Installation & Setup
UEFI BIOS upgrade
My machine is 2 1/2 years old and due a bit of an upgrade and tidy up. Only hardware upgrade this time will be replacement of the C: drive with an SSD. I'll be doing a full OS & SW re-install rather than cloning what I've got now, so I'm checking for the latest drivers etc to use. Looking at...
Hardware & Devices
Startup question - computer showing me some kind of BIOs?
Afrer not using the computer for a week, my pc suddenly powers up by it's own each time I open the slot for the CPU on my extension meaning I don't have to press the power button on the CPU which is weird, and instead of hearing just one beep, my CPU makes 2 more beeps after the first one. After...
General Discussion
UEFI BIOS Windows 7 do I have it??
Hello everybody. I have a question I'm hoping somebody can help me with. I have a Dell XPS 8500 which will be 2 years old this August. I am looking into installing a much bigger internal hard drive but have found out that I need the newer UEFI BIOS to do that. Well I have been driving myself crazy...
General Discussion
Is the Dell Vostro 400 (my computer) and Toshiba T135 (my laptop) legacy BIOS or UEFI? Note: I have not yet updated the BIOS because I'm too lazy to do so and because it is not required.
Hardware & Devices
Uefi bios setup
Hello here, I am new here and i would at first say thanks to all them who supports that site to be alive and help all in the world. I need your help: I want want install windows 7, it is asrock, but when i choose boot priority there is only one option hitachi there is no dvdrom to boot...
Installation & Setup

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 12:42.

Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App