Setup Installation :: Win 8.1 - Convert BIOS To UEFI
Apr 14, 2014
I have windows 8.1 installed on 120gb ssd. I also have a 1tb HDD too. So I was trying to install Hackintosh/Linux when I noticed that the System Reserved partition was on my HDD instead of the SSD. So, I used easybtc to migrate my boot files to my SSD. I deleted the system reserved partition. Now I want to convert my BIOS to UEFI. I have Z87 pro mobo.
I tried this tutorial: [URL] ....
But it seems to be geared at the C drive, where I don't have room for that 350mb as disk utility wont let me shrink it.
Edit: would downloading a third party partitioner, shrinking C about 350mb, or whatever is the minimum, and then use that new space as described in the guide work?
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Jan 29, 2014
Right before I performed a clean install of Windows 8.1 x64 on my Inspiron 3520, I switched to the Legacy BIOS *facepalm*.
When I enter the legacy BIOS and enabled "secure boot", I performed a restart that gave the following message "internal hard disk drive not found, to resolve this issue, try to reseat the drive. No bootable devices--strike F1 to retry boot, F2 enter setup menu, F5 enter PSA". Of course, when I go back into the BIOS and disable secure boot, it reverts back to legacy and boots up Windows 8 just fine. What I'd like to know is, how can I revert back to UEFI so I can change the boot-up option and perform a clean install under UEFI.
Making the Switch to UEFI | sepago
[URL]
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Nov 13, 2013
Have a toshiba laptop with the UEFI encrypted windows 8 key. The hard drive was broken as it was dropped. No sticker on the bottom as is now microsoft policy. Download of the windows install needs the windows key. Cant get it as it's encrypted. Found generic windows 8.1 keys which worked but it said it was the wrong key for those installs. Generic windows 8 keys don't work for the download. Going around in circles and not sure what to do.
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Jun 13, 2013
Question: How would you approach this migration?
I just bought a copy of Acronis True Image 2013 with Plus Pack. It appears that this is all I need as True Image will install the new motherboard drivers as part of the migration process. But do I stay with MBR or move to GPT?
Presently both Win7 (on a 120GB SSD drive) and Windows 8 (on a different 120GB SSD drive) are both MBR format. I don't want to start over from scratch. That's why I bought the Acronis 2013 with Plus Pack.
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Jul 21, 2014
I'm trying to install windows 8.1 to an external hard disk (solid state drive 128 gb usb3).
I've tried easyUFEY WinToUS creator and AOMEI Partition Assistant Standard(Windows to go) with no luck.
My bios has UEFI option only(no legacy). On my old laptop it works just fine(I had the legacy option) but now, I cannot do that anymore.
I'm pretty sure it's a bios boot issue and I don't know how to fix it. I've tried using GPT partition instead MBR, Still nothing.
The laptop is a sony vaio duo 13 and I have no legacy option in bios
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Jul 24, 2014
Yesterday, after many, many problems with my computer, I finally decided to reinstall Windows 8.1 Pro onto my ASUS X200CA netbook. However, after backing up and reinstalling the OS, I found that when I tried to disable "Launch CSM" in my BIOS, all of my boot options would disappear and my laptop would continually boot into my BIOS. When I re-enabled "Launch CSM", the boot options would reappear - however, it had not included the "Option #1 - Windows Boot Manager" that I had seen in my other installation.
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May 31, 2013
On my computer there is a pre-installed Windows 8 which works fine for UEFI boot (Secure boot not necessary).
Now when I switch in UEFI setup at boot time the UEFI mode into the CSM (BIOS) mode and restart then Windows 8 is not starting any more.
As far as I find out an UEFI-based Windows 8 can only boot with UEFI mode enabled.
So my question is: Can I turn an existing UEFI based Windows 8 installation into an CSM/BIOS based installation (=a Win8 which boots successfully even when I enable CSM in UEFI setup) ?
If yes: How do I do that?
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Feb 2, 2014
Ok I have my prompt saying DISKPART> so how do I get it to run on my f: drive. convert f: to mbr. Where do I tell or input that it is the f: drive..what would be the correct syntax?
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Feb 6, 2013
My HDD currently have windows 7 with 3 partitions and I want to dual boot with windows 8 in one of the empty partition, but the install is failed "Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks."
If I do the Diskpart Clean command, will it wipe out the entire HDD and windows 7 OS? if so, is there a way to convert HDD to GPT without wipe out windows7 OS on the HDD?
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Dec 12, 2013
I just built a desktop with a sabertooth x79 motherboard, and am running Windows 8.1 pro 64-bit. When I click the UEFI BIOS Firmware live tile via the change PC settings>update and recovery>recovery>etc. my computer reboots normally to Windows and will not open BIOS. I have tried accessing it using the delete and f2 keys, but this does nothing either.
I am up to date in terms of my BIOS, and am definitely running UEFI and not legacy.
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Jul 21, 2014
Acer laptop already has Windows 8.1 installed. It has a MBR disk. My USB Flash Drive won't boot from it but it does my my desktop so not the USB flash drive.The flash drive was created for UEFI or MBR boot using Rufus. I tried the tutorial in sevenforums to convert the Acer to GPT but it says the boot drive is in use and can't. I tried to boot to a Command Prompt but that gives me an X: drive and I can't change it to C prompt. I have done this before from a boot drive and it worked but won't on this machine. How can I get this converted from MBR to GPT??? How can they make that tutorial work for them? They are doing it from within windows there??? This machine BIOS has nothing for legacy or UEFI or secure boot for sure. Is my only option MBR then? If it is what do I make the flash drive with as Rufus option says for UEFI or MBR but won't boot this machine. Yes I have it to boot first but it lights up but goes straight to windows.
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Feb 23, 2013
I already bought and installed Windows 8. I have a i7 laptop with 64bit proccessor but somewhat the company decided to pull it out with win7 32 bit OS. When I upgraded to Windows 8 I wanted to switch to 64bit but didn't find the option for that during the installation proccess. Can I do it now? switching from 32 to 64 (I understand that I will need to reinstall the windows again, I just don't wanna pay again for that).
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Jan 6, 2013
Here: [URL] .....
Somewhere in that link it says:
During POST enter "BIOS Boot Selector Menu" by pressing F7.
Intel says: <F7> No uefi setup option in boot selection
Others say: <F8> No uefi setup option in boot selection
I say: <F12> No uefi setup option in boot selection
Lenovo Z580, my brand new laptop that is, its UEFI based and vymrdal's ISO from MSDN is also created to be installed as an UEFI Install.
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Nov 25, 2013
I have a Dell Inspiron 7720. I have created an uefi bootable usn flash disk with rufus 1.4b
I'm trying to boot from it so i can create a Windows 8.1 uefi installation and the problem is that the usb flash disk wont boot.
I have secure boot enabled and legacy option rom disabled.
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Jan 28, 2013
Is it possible not to have the partition "recovery"?
Because if you look at the two tutorials:
- UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with - Windows 7 Forums
- UEFI (Unified Extensible Firmware Interface) - Install Windows 8 with
In the tutorial to install Windows 7 in UEFI, there is not that damn partition recovery, while in the tutorial for Windows 8, we can see it.
When I install Windows 7 (MBR mode), I avoid this partition "recovery" by creating a partition with a name before installation. I install the OS on it and everything is fine, no partition "recovery" But here, since one must delete all partitions, If I create a GPT disk with a partitioning tool before installing, is that it might be appropriate?
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Dec 11, 2013
I cloned my existing Windows installation (8.1 pro, 32 bit) onto my new SSD. I got everything up and running, and I still have my old Windows installation on one of the partitions of my HDD.
Can I turn this setup into a dual boot?
I think this could be useful, in case the new installation gets borked, or in order to run an effective malware scan on the SSD, etc.
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Jan 27, 2013
Just a quick question about UEFI installation. I've got the Windows 8 Pro DVD but I lack USB Flash Drive 4Gb, is it possible to install Windows 8 with UEFI support with the DVD support or as written in the tutorial the USB Flash Drive is mandatory?
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Aug 14, 2013
I have an ASUS Zenbook UX32V, which came with win 8 preinstalled.
I was having endless problems with Windows 8, such as software compatibility, and formatted the laptop (removing all partitions), and installing Windows 7 over it.
This has worked fine to date, but I now need to switch to Win 8 again.
I know my laptop supports UEFI, and that the Windows 8 installations are no longer probably on the computer. Is there a way to recover the cd key from the UEFI and use this to download the Win 8 installation files again? The CD key was not supplied in the laptop documentation...
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Nov 18, 2013
Is it possible to install Windows 8.1 as Legacy with MBR? Or only as UEFI with GPT? I'm kind of confused with all this UEFI business, I always used MBR in my Windows installations. Also, Truecrypt does not support UEFI, so if installing Windows 8.1 I should do it as legacy.
Also, how can I control during the install process if I want to set my system installation as UEFI or Legacy?
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Jan 14, 2014
using the UEFI install instructions from this forum. I do meet all of the requirements (Windows 8 64-bit iso, ASRock Z87 Extreme4 mobo, blank SSD). When I get to Step 7 in the UEFI guide, I only get 2 partitions instead of the 4 shown(Recovery, System, MSR, Primary). I only get System and Primary. I decided to delete all partitions and just run the setup on the unallocated drive...everything worked fine. I am just wondering what the consequences are of not having those 4 partitions. I still have the UEFI interface when I boot up so it appear that is working.
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Sep 19, 2013
I've made a UEFI Win8PE by WADK , then burn it to a CD. I boot normal and I can see X:WindowsSystem32.
I use EasyBCD to [Add New Entry] to append new boot item to existing Windows 8. The boot menu becomes like this :
Windows 8
Win8PE
But the Win8PE fail to boot with error message like insert Windows disc again ...... in the primary black and white screen.
Should I not to use EasyBCD to [Add New Entry] ? As I do the same thing in BIOs + MBR harddisk that booted perfect. In UEFI + GPT partition , do I better not to use EasyBCD , instead to use BCDEDIT , if so , what's the command line to do this with bcdedit ?
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Jul 9, 2013
accidentally i delete my efi partition. now i cannot boot up to windows 8
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Aug 20, 2013
I have an Acer Aspire 5745G-644G50MNKS notebook with preinstalled OEM win 7 home premium.
Specs as following:
Core i7 640M Processor (2.87GHz, 4MB L3 Cache)4 GB DDR3 RAM500 GB HDD15.6" 16:9 HD LED DisplayDVD RW1 GB VGA (NVIDIA GEFORCE GT 420M)WIFI / Bluetooth / Card Reader / Web Cam
I'm wishing to update my system into Windows 8 Pro or Enterprises. But unfortunately my model isn't appears in Acer's Windows 8 Eligible Models list or Affected Models List.
I think my system has more than enough performance to run Windows 8. But my bios don't have UEFI support. So, i just wanna know will my computer be able to run Windows 8 without any troubles without that secure boot option.
I"ve run Windows 8 Upgrade Assistant Tool in my system and it says everything is okay except Secure Boot option. also I'v checked individual hardware vendor sites for the latest drivers for windows 8. Most products has the drivers, And the current drivers also compatible with Windows 8 according to the upgrade assistant.
What should i do so? Will the win 8 upgrade useless in my system? or it will be better than the current win 7?
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Dec 19, 2012
On a new Win 8 laptop I can't boot from a USB flash drive or even a CD unless I turn off secure boot in the BIOS?
This surely can't be progress?
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Jun 30, 2013
I have a Lenovo B575 laptop that is not UEFI capable; however, I have downloaded the x64 Win 8.1 ISO, burned it to a bootable DVD and a bootable USB drive and tried installing Windows 8.1 using a boot from DVD and also a boot from USB drive, and neither method has resulted in a successful installation. The root cause of the installation problem is that Windows 8.1 is intent on creating an EFI partition structure on my non-UEFI machine.
So, I end up with a 300MB Recovery Partition and a 100MB EFI Partition which doesn't work well on my machine. Now, during the installation process, I opted to delete all existing partitions and allow the installation to properly partition the hard drive for installation; however, I knew I was in trouble when the machine started hanging during reboots.
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Feb 12, 2013
I have made a clean install of Windows 8 using USB and UEFI. Somehow it seems the instalaltion is not quit right of what I have read... Have attached picture of the Diskmanagement (OS is Norwegian by the way).
Compared to this thread: UEFI (Unified Extensible Firmware Interface) - Install Windows 8 with for me something is missing/wrong.
I have a laptop with one SSD and two internal disks. Both internal disk were removed before the installation, and connected and formatted after finished the installation.
It can me mentioned that I downloaded the OS, saved it as .iso file, then copied onto the USB disk. Then connected into the laptop and booted from USB/UEFI.
I did not follow these steps: UEFI Bootable USB Flash Drive - Create in Windows
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Oct 27, 2013
So my computer is a Windows 8 Laptop, with UEFI on it..... I want to have Legacy instead of UEFI, and I was told on this site that I could do it, but I needed to reinstall Windows 8.....
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Sep 15, 2014
I have original ISO file from MSDN website - it is Windows 8.1 Update 1 Enterprise (x64) MSDN version with Slovak language interface. I create a bootable DVD (Verbatim DVD-R 4,7GB) in program ISO2Disc. This ISO I would like to install on to my system , more details about my pc - see my system specification. My motherboard is MSI Z77 Mpower with latest version UEFI - BIOS 17.12
I have a few question about installation a new windows 8.1 in uefi mode:
-what a bootable media is better ? I think USB stick or DVD disc
-what the function in the BIOS I must turn on or off, I mean the fast boot or memory fast boot
-UEFI mode is better then LEGACY mode ?
I have a bootable DVD Parted Magic , it is good Partition Manager. I must change MBR format to GPT - only GPT is supported format for UEFI , is it rue ? So , now i should format all disc inside my pc (secure erase for ssd disc and wipe for hhd). I can create NTFS partition with GPT format and aligned to 1204MB for all solid state discs and HDD. I can do this ?
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Jun 6, 2013
My notebook has a Win 8 OEM key in UEFI. After wiping my hard disc I want to install Win 8 retail instead of OEM version.
Because this is not possible with stored OEM Win 8 key I want to boot with a Win 7 BootCD and patch the UEFI with a Win 8 retail serial key.
For that I need a Program like SLIC which accomplish this task.
But where do I get this SLIC tool?
is there another way to enter a new Win 8 key into UEFI from Win 7?
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Feb 17, 2013
I would like to reinstall Win 8 on my ASRock UEFI motherboard in the UEFI mode. I have Win 7 OEM and the downloaded Win 8 Pro upgrade. I have the Win 8 Pro upgrade burned to an ISO disc. I also have the hard drive backed up to Acronis 2013 and have an Acronis WinPE rescue disc to boot with to restore.
Several questions.
(1) If I convert to UEFI and format the drive to GPT, will Acronis restore to the GPT (from MBR)?
(2) If Acronis won't restore, will converting to UEFI/GPT affect installing or activating the Win 7 OEM and/or the Win 8 Pro upgrade (I assume I'll have to install Win 7 and then upgrade to Win 8).
(3) Will a UEFI system read other hard drives that are MBR formatted?
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Mar 13, 2013
Laptop: ASUS UX31A-DB71, latest BIOS: 218
Originally my laptop came with Windows 7 and when i looked at disk management my disks were formatted with UEFI schema. One of my friend gave me a UEFI bootable USB drive loaded with Windows 8. So, i thought why not give it a try. So, I created a backup of my OEM Windows 7 and saved the iso files in a seperate external HD (created twice just to be sure . Now, i decided to load the Windows 8. Booted into the BIOS and there is an option to select the USB drive along with the UEFI option for that USB drive. I selected the UEFI option but some reason it does not boot into UEFI.
So I decided to select the standard USB install and this option let me install windows 8. In the process of installing i formatted the partitions and made a single partition and installed Windows 8 on it. I am guessing now the drive is not GPT but MBR. I also noticed that his installation USB disk had an option to select either 32bit or 64bit of Windows 8... Would Microsoft create a same iso file with both versions? I am guessing he created the USB from a illegitimate source.
I am planning on purchasing Windows 8 Pro version as an iso but wanted to be confident that it would work with UEFI architecture.
Questions:
1. Why would the system NOT boot from UEFI?
2. If I download the legitimate iso from Microsoft and wanted to install Window8 Pro via UEFI, I am sure i would have to format my SSD to GPT and how would i go about formatting it during installation?
3. How would i create a recoverable USB for my iso image i created for Windows 7 via ASUS AI Recovery. Do I need to follow the same procedure as stated in creating bootable USB disk (i.e. FAT32 system) via diskpart utility?
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