Solved

Windows 8.1 UEFI Question

Posted on 2015-02-20
7
157 Views
Last Modified: 2016-11-23
I have a new Dell desktop Inspiron3847, but I suppose this question is not unique to Dell.  I think it is a Windows 8.1 question.

I am using backup software. In case of a failure of my system I need to boot to a flash drive.  I thought I understood that Windows 8.1 will not boot to a flash drive automatically.  If I understand correctly, if I want to boot to a flash drive I need to turn off UEFI Secure boot.  If I understand correctly, Secure boot makes my machine less susceptible to invasion by outside entities, so, I suppose the best way is to have secure boot on all the time, except for those special times when I want to boot to a specific device, then, after the condition passes, turn secure boot back on again.  Is this correct?
0
Comment
Question by:WoodrowA
7 Comments
 
LVL 92

Accepted Solution

by:
John Hurst earned 250 total points
ID: 40622093
You might need to turn UEFI off, but I think Windows 8 knows what it is making and the drive is supposed to boot if the computer will not start. So the USB key made should be able to start the way the computer is (UEFI enabled) as Microsoft would have set the boot that way. I have not had need to try mine at this point.
0
 

Author Comment

by:WoodrowA
ID: 40622192
Thank you for responding.

I am using Paragon backup software and it has a tool that creates a boot disk (flash drive) in what I believe is a Win PE protocol.  I created this flash drive and then booted my machine with Secure boot enabled and sure enough, it sees the flash drive.  

Why is this?  When the drive was created was it created in such a way that Windows recognizes it automatically?  I have two other USB drives connected to my computer but when the (F12) boot screen appears with Secure boot on, it does not see them.
0
 
LVL 92

Expert Comment

by:John Hurst
ID: 40622254
I think a non-Windows 8 flash drive would need UEFI disabled to boot.

I think only a Windows 8 recovery flash drive will boot with UEFI enabled.  Otherwise Joe Public would not be able to recover.

What you are seeing is a function of Windows 8, not the Flash drive.
0
[Webinar] Disaster Recovery and Cloud Management

Learn from Unigma and CloudBerry industry veterans which providers are best for certain use cases and how to lower cloud costs, how to grow your Managed Services practice in IaaS clouds, and how to utilize public cloud for Disaster Recovery

 
LVL 88

Assisted Solution

by:rindi
rindi earned 250 total points
ID: 40622257
WinPE is based on Windows and should use it's signature, and that should be included in the secure-boot signature database. So such media should boot with secureboot on. If it doesn't, then disable secureboot.

Also several other OS's like some Linux distro's have been added to secureboot. So whenever you can boot, leave it on, if it doesn't boot turn it off.

Generally though secureboot doesn't really add much security. The OS can still be attacked. It is more an M$ "feature" that they forced on UEFI BIOS, which makes it harder to install other OS's. Particularly on Windows RT devices which use ARM based CPU's, you can't even disable secure-boot, so there you can't Replace Windows RT with another OS like Linux.
0
 
LVL 46

Expert Comment

by:noxcho
ID: 40622285
Paragon signed its products by Microsoft and the WinPE based drive it creates is detected as MS boot device. Usually you do not need secure boot to be enabled if some boot device with malware is not used on this PC.
0
 

Author Closing Comment

by:WoodrowA
ID: 40623192
Thank you
0
 
LVL 92

Expert Comment

by:John Hurst
ID: 40623233
@WoodrowA - You are very welcome and I was happy to help.
0

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Problem I recently had a lot of trouble with File Explorer hanging on my personal computer running Windows 8.1. It's important to note that this isn't Internet Explorer. This was happening when I attempted to access a local network location where I…
With Windows evolving further, the built-in protective mechanisms get better and better. Still, Microsoft is not very good at introducing those to the technical community. This article is about a new bitlocker functionality that could revolutionize …
This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…
The Task Scheduler is a powerful tool that is built into Windows. It allows you to schedule tasks (actions) on a recurring basis, such as hourly, daily, weekly, monthly, at log on, at startup, on idle, etc. This video Micro Tutorial is a brief intro…

912 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now