Windows 8.1 Ent eval enabled Secure Boot I think

I want to get my laptop back to its original format.
Currently dual booting Windows7/8.1
During the installation of Windows 8.1 Enterprise evaluation it paused to say it was going to enable secure boot.  I did'nt think much of it I thought I could change it back from the bios.  Did it flash my firmware?  I checked the system status
with msinfo32.exe; was legacy mode and with powershell; secure boot not supported.  I don't have any options to disable secure boot in the bios nor from within Windows -"I know how to disable it in windows 8.1".  I can't boot a foreign
operating system, but I can boot a Microsoft OS which sounds like secure boot to me.  I want to get it back to running Windows 7 dual booting with Linux.  I use both at work and need both.  I made the mistake by loading the Eval on my primary
laptop.  I read I need to revert back to Windows 7 completely, formating and re-installing the OS.  Will this clear my secure boot simulation issue?  I have not changed the partitions or removed any O/S's.   What's the best way
to proceed?

Hi,
I want to explain that, Secure Boot is indepent with system, you can disable it in UEFI interface.
To disable Secure Boot, you can follow the steps below:
1.Before disabling Secure Boot, consider whether it is necessary. From time to time, your manufacturer may update the list of trusted hardware, drivers, and operating systems for your PC. To check for updates, go to Windows Update, or check your manufacturer's
website.
2.Open the PC BIOS menu. You can often access this menu by pressing a key during the bootup sequence, such as F1, F2, F12, or Esc.
Or, from Windows, hold the Shift key while selecting Restart. Go to Troubleshoot > Advanced Options: UEFI Firmware Settings.
3.Find the Secure Boot setting, and if possible, set it to Disabled. This option is usually in either the Security tab, the Boot tab, or the Authentication tab.
4.Save changes and exit. The PC reboots.
I found an aticle that teach how to install dual-boot Windows 7 and Ubuntu 12.04 on a PC with UEFI hardware:
http://www.linuxbsdos.com/2012/10/11/dual-boot-windows-7-and-ubuntu-12-04-on-a-pc-with-uefi-hardware/
Hope this helps.
Roger Lu
TechNet Community Support

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