Highlighted
arjo15
Copper

Dell Latitude E5470 Issue after BIOS Update HELP!!!

I decided to update my drivers and BIOS this morning. My laptop encountered an error during BIOS update and I was stuck in Automatic Repair. 1. I tried restarting the laptop several times. 2. I tried system restore which worked after my second try. The problem is Windows applications like Calendar, Mail, Cortana are not working. It doesn't run and the application is grayed out. 3. So I tried resetting Windows, remove everything which was not successful. Problem got worse, I got stuck on the Dell logo. 4. I ran Diagnostic. No hardware issue found. 5. I tried booting from my bootable USB which contains Windows OS. But my laptop is unable to detect it in BIOS. 5. I read some forums and learned about Legacy vs UEFI and Secure Boot. I disabled the Secure Boot and enabled Legacy ROMS. My laptop was able to boot from the USB and I was able to reinstall Windows 10. Now, the problem is I want to change it back to UEFI with Secured Boot. From what I gather, I should do the following: 1. Download Windows OS 2. Make a bootable USB in UEFI mode and GTP partition 3. Change laptop to UEFI mode while Secure Boot is disabled. 4. Re install Windows 10 Am I going in the right direction? Please help me.
0 Kudos
2 Replies
Moderator
Moderator

RE: Dell Latitude E5470 Issue after BIOS Update HELP!!!

anjo15,

Secure Boot and BIOS Setup "Load Defaults"


The BIOS Setup program has a button "Load Defaults". This button loads the default values for all BIOS Setup options, with one exception: Secure Boot. This is to prevent a user from clicking "Load Defaults" and then no longer being able to boot his UEFI/Secure Boot-supported OS.

If Secure Boot is disabled, clicking "Load Defaults" exhibits no special behavior - the user is asked for confirmation and then all BIOS Setup default values are loaded.

If Secure Boot is enabled, a second confirmation box is presented to the user notifying him that Secure Boot will be disabled. If the user selects "yes", all BIOS Setup default values are loaded, including Secure Boot; that is, Secure Boot is disabled. If the user selects "no", Secure Boot is left enabled and all other Setup defaults are reset to their default values.

There are two BIOS Setup options tightly coupled with Secure Boot: "Enable Legacy Option ROMs" and the Boot Sequence page's "UEFI" boot paths setting. In order to support Secure Boot, "Enable Legacy Option ROMs" must be disabled and the Boot Sequence page must default to a "UEFI" boot path. Therefore, to prevent a user from getting into a situation where Secure Boot is enabled, but "Enable Legacy Option ROMs" is enabled, or the Boot Sequence does not default to "UEFI", the Secure Boot SMM driver will automatically disable "Enable Legacy Option ROMs" and set the Boot Sequence to "UEFI" if it detects Secure Boot enabled. This behavior mitigates the situation where the user clicks "Load Defaults", enabling "Enable Legacy Option ROMs", even though Secure Boot is enabled.

Installing Windows 10


Social Media Support
#IWork4Dell
To help us troubleshoot, please send us the Dell service tag number via a private message
Drivers and Downloads
Driver order




0 Kudos
arjo15
Copper

RE: Dell Latitude E5470 Issue after BIOS Update HELP!!!

Hi Jesse, my laptop is OK now. I had to reinstall Windows 10 OS using a bootable UEFI USB using GPT partition scheme.

0 Kudos