Installation :: After Upgrade Revert To W8.1 On UEFI Machine
Jun 4, 2015
Assume a computer with the UEFI firmware interface.
Assume that during or after a user has upgraded a W8.1 machine to W10 things go horribly wrong - Black screen, Blue screen, No screen. The user now tries to Boot from a USB Emergency Boot Disk that they previously created using the W8.1 utility and then they try to restore W8.1 from a System Image Backup (the one in File History) that they previously created.
Will this be possible and will the Product Key in the UEFI firmware allow a reinstall of W8.1 after a W10 upgrade...?
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Aug 4, 2015
I have already upgraded to WIN10 from WIN7 on my experimental desktop and then reverted back using the built in facility. Can you do this more than once if you keep on wanting to give it a go to see if bugs have been fixed or is this eventually going to cause issues with the license?
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Aug 11, 2015
Recently upgraded to w10 from w8.1 via the upgrade option, then proceeded to make a USB boot with w10 and performed a clean install.
However, something is fishy with my system and w10 so for now i want to revert back to w8.1 via a clean install of w8.1
When i installed w10 however i noticed i have an abundance of partitions, and preferably i would only like to have my SSD and HDD as optional storage spaces. I do of course not want to delete any necessary recovery or system partitions, but to me it seems like i currently have too many.
Which of the partitions in the picture below can i delete? Is it safe to delete all the recovery partitions when clean installing w8.1 from usb? meaning that will the installation create the necessary partitions required by windows?
See picture for info(gjenoppretting = recovery)
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Nov 14, 2015
I have a Dell XPS 9100 machine that is triple boot, Win 7 SP1 Drive on C (this is the OEM OS), and Win 8 (not 8.1) on Drive I, and Win XP SP3 on Drive D.
I would like to do a upgrade of the Win 7 SP1 Ultimate drive C to win 10 pro th2-10586. How I might do this and keep my triple boot intact?
I have been an insider since the program started and have run win 10 pro on several VM's on my win 8 OS. I also have Two Retail win 10 pro USB drives (10240) that I'm sitting on.
Would it be better to upgrade the OEM OS or do the upgrade from one of the retail USB drives and then let it update to th2-10586?
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Dec 13, 2015
I've had Win10 installed for ages and no problems until Upgrade 1511 came along. How come Windows 10 worked all that time and now refuses to upgrade?
Upgrade to Windows 10 Home, version 1511, 10586
error message:
"Windows 10 couldn't be installed
*Windows couldn't be installed because this PC has an unsupported disk layout for UEFI firmware."
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Aug 25, 2015
last few hours I spent trying to manually deploy Windows 10 on clean GPT disk but after applying image and rebooting I always end in unbootable state.
I manually setup drive like this:
Code:
select disk 0cleanconvert gptcreate partition primary size 350 #RE tools won't fit 300MB anymore :-)format quick fs ntfs label "Windows RE tools"assign letter tset id de94bba4-06d1-4d40-a16a-bfd50179d6acgpt attributes 0x8000000000000001create partition efi size 100format quick fs fat32 label Systemassign letter screate partition msr size 128create partition primary format quick fs ntfs label Windowsassign letter wlist volumeexit#no recovery image partition as per documentation it is no longer needed and followed by pretty common deployment:
Code:
dism /apply-image /imagefile:g:Sourcesinstall.wim /index:1 /applydir:w:dism /image:w: /set-Timezone:"Central Europe Standard Time"md T:RecoveryWindowsREattrib w:WindowsSystem32RecoveryWinre.wim -h -s -rcopy w:WindowsSystem32RecoveryWinre.wim T:RecoveryWindowsREwinre.wimbcdboot w:windows /s s: /f UEFIw:WindowsSystem32
eagentc /setreimage /path T:RecoveryWindowsRE /target w:Windows
After reboot I always end unbootable (as we talk Apple computer it means 1) no partition on Option or 2) folder with ? or 3) just gray screen, make your pick). There's a chance that Windows rely on some UEFI 2.0 feature, which is not available as the old guy has 1.2 only. Or maybe I missed some step somewhere.
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Aug 31, 2015
Is it advisable to set the UEFI BIOS (Asus ROG Hero Maximus VI motherboard) to a factory default settings before installing Windows 10? Or should I at least set the memory "XMP" profile?
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Jan 24, 2016
Is it possible to still revert a PC to the original factory condition using the factory restore partition after Windows 10 has been installed or does the installation of WIN 10 prevent that? None of the other options to do a restore back to the original WIN 7 (as purchased new) are available to me.
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Aug 1, 2015
I installed the upgrade to W10 and I think I should have waited. Things are slow to open and lockups, frozen screens and streaming problems are happening all the time. I see there is a go back to Windows 7 option and I may take it for now, and do a clean install at a later date.
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Aug 23, 2015
I currently plan on doing a clean install on a new ssd of Windows 10. My current mobo is a ASUS P8z68-V which has UEFI so I plan on doing a UEFI installation of Windows 10. However, I plan on getting a new processor and motherboard sometime in the future, so would I have to do a reinstall of Windows 10 when I get my new motherboard, or could I expect it to boot up normally as would a traditional BIOS system would work?
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Sep 9, 2015
Okay so I stupidly decided to upgrade to Windows 10.I left the install going and went out. When I came home it was stuck on a black screen without a cursor.The problem I am facing now is, sometimes I can get the laptop to go to the system restore menu if I screw around with it long enough, but it won't let me in because I don't have a password to log in (I never had one on this laptop) but it still requires one? And I can't seem to find any other way to get back to Windows 7, since I usually can't see anything at all?
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Aug 10, 2015
When I started the recovery process to revert back to Windows 7, I saw a warning that I would need to reinstall some programs after reverting. I aborted at that point. What programs I would need to reinstall?
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Aug 10, 2015
How to be able to get to the login screen and actually log in by booting through a USB. But then when I try to revert, it restarts and when it reboots. It gets locked in a screen that has a blue Windows logo and a black screen with nothing else.
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Aug 7, 2015
My Windows 7 was updating to Windows 10. When it appeared to almost be done configuring a message appeared stating the Windows 10 could not be installed and it was restoring the previous version of Windows.
Well that did not work. The pc will not boot up now. Instead I get: "Windows could not start because the following file is missing or corrupt: <windows root>system32hal.dll Please reinstall a copy of the above file"
I hope I can add the file using the win7 dvd. I know I was getting low on hard drive space, but had cleared enough to have 4 gig or so free. It was either not mentioned anywhere or I missed how much hd space would be needed. Of course I am assuming that the install bombed due to this?
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Sep 20, 2015
So I made the mistake of upgrading my Dell Venue 8 Pro to Windows 10... It's very slow and buggy.
I tried using the built in "Revert back to Windows 8.1" option in the Settings "app", but it says that files have been deleted and it can no longer perform the uninstallation.
I also tried going into the tablet's built in Backup and Recovery from Dell, but that doesn't allow me to reinstall Windows 8. It's merely a diagnostic.
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Feb 10, 2016
I just brought a 128GB sandisk ultra usb 3.0 because as a computer tec im tired of fumbling through my tons of usb drivers to do a job. , i want my windows installers & Linux, bookable tools and such all in one usb. so i looked into multibooting usbs and came across many tools, one being SARDU. But i need a hybird UEFI/MBR boot and my laptop doesn't support uefi & legacy simultaneously only one or the other.
So using SARDU i cant see or boot from the usb unless i switch bios to legacy mode, works well because i see and can boot from all of what i have windows installers and linux distros but i have to keep switching back and forth between legacy and uefi. i was wondering if i can make the usb primarily Uefi bootable BUT also bootable for a old MBR if needed.
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Jan 7, 2016
I'm upgrading my mom's laptop from windows 7 to windows 10. Since my last upgrade I seem to have misplaced my USB Stick that has the UEFI Windows 10 install media on it. I do, however, have a few DVDs lying around that are large enough to make a Installation DVD. If I use the Microsoft Windows 10 Media Creation tool, will it create a UEFI Installation DVD?
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Jul 18, 2015
In Windows 8 there a way to change settings in your PC's UEFI firmware. Is this possible in W10?
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Feb 10, 2016
i've installed windows 10 on linux before and i've never had any problems booting it (from what i remember, through UEFI boot sources). currently the windows 10 iso seems to be the only one that isn't appearing in UEFI; i installed peppermint from lubuntu using the same image disk writer on the same usb 30 minutes ago.am i supposed to have some specific settings enabled/disabled in my bios to boot the windows install? secure boot is disabled and legacy boot is enabled.
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Feb 10, 2016
I've rescued an old small server(working with Red Hat enterprise -- but I can't have the OS as it's licensed by the office) from our office --was being chucked out but looks quite good to me.
4 SATA bays populated with 4X 3TB HDD's (the HDD's were mine BTW !!!). I'm thinking of using this as a NAS server - 16 GB RAM and decent Intel CPU (i3 equivalent -- good enough for media server).
The only problem is that it's MBR BIOS and I have two RAID 0 arrays consisting of 2 X 2 3TB HDD's.
Installing Windows though -- No HDD's seen !!! yet there's 12 TB of them in the system.
The RAID is onboard --not a separate RAID controller.
Should I remove the HDD's and send the server on it's original journey to a one way trip to the City's TIP.
(On board VGA good enough also for running a GUI - if I can ever install an OS on it -- preferably W10).
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Dec 23, 2015
So, I have Windows 10 already installed on my PC. I upgraded it last Summer from Windows 7 for free.
I've been trying to update it for the past 6 weeks but keep getting the error: "Windows 10 couldn't be installed. Windows can't be installed because this PC has an unsupported desk layout for UEFI firmware."
I have 3 hard drives and Win10 is running on my main SSD, disk 0. I remember having some funky upgrade issues and needed to unplug certain hard-drives due to strange ownership issues. Heres is a look from Disk Management. I've got an MSI m-board plus BIOS, all new.
[URL] ....
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Feb 10, 2016
After resetting UEFI to default values, I can't start WIndows because boot goes to UEFI.
I wanted to make a clean install of W10 and for that I had to make some changes in UEFI because it wouldn't allow me otherwise. But after the installation I see that I have some problems with the sleep and fast boot, not working well. So I went to UEFI and reset it to default, saved and exit. On boot, it goes to UEFI once and again. Windows doesn't load.
So I have to do the same changes that I had to do for installing W10. Disable fast boot, etc. And then yes, I get to Windows, but keep having the same sleep and boot problems. Both work really bad in different ways.
I also did other changes, by the way. I couldn't install W10 because it said that my disk was GPT partition style, so I had to follow some instructions to change that, which wiped my disk and partitions completely and maybe I missed some step...
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Feb 23, 2016
As the title says how exactly do you achieve this?
I have an ISO Ran RUFUS 2.6
GPT Partition Scheme for UEFI
Fat 32
8192 Default
X Quick Format
X Create a bootable disk using
X Create Extended label and Icon Files
so the next part is the Kicker Dell did a number on their Bios and rather than using standard logic as we have done so many years just setting the boot order to "Boot USB" first, you "Only" have the option to create a "Boot Program"!!! so you select your USB Drive then which ever file you want it to boot I'm Assuming? So I tried selecting Setup, bootmgr.efi, and autorun with no results!
I get the secured boot error crap, turn that off and I get Legacy BIOS (that defeats the entire point) What the hell happened to Win95 Boot Discs and FDISK?
I am so frustrated with this garbage, I found out the hard way with Windows 10 and trying to nuke the SSD and put a clean install of 8.1 on it.
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Sep 1, 2015
How do I set my BIOS to have the DVD boot and install Windows 10 in UEFI mode? I do see a setting on my Asus motherboard UEFI "CSM Compatability" and in there are three options:
UEFI and Legacy OPROM
Legacy OPROM only
UEFI only
Do I select UEFI only option here?
What is the benefit of installing in UEFI vs Legacy? All I understand is that the system sets up more partitions.
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Aug 25, 2015
Okay, so the other week i received a new Clevo P650SE laptop. The laptop only had a 500GB 7200RPM HDD with Windows 10 to begin with, so yesterday i added my Samsung 840 EVO SSD. As i wanted this to now be the primary drive, i made another new installation of Windows onto here. After doing this, the system now displayed a boot selection at startup with the choice between the new Windows 10 installation on my SSD or the old one on the HDD.
As i no longer wanted to use the HDD for running Windows, i decided it would be best to delete Windows from this drive. So i booted onto an Ubuntu USB and wiped the entire drive of it's data in GParted, which included three different partitions. This seemed perfectly fine to me at the time, because i had a the new installation from the SSD showing up in the boot manager.
However, when i rebooted the machine and attempted to boot into the new installation on the SSD, it gives me this message:
"The boot configuration data from your PC is missing or contains errors.
File: /EFI/Microsoft/Boot/BC Error code: 0xc000000f"
I have tried everything to recover the system but nothing has worked. Startup repair from my Windows USB doesn't do anything, the system reset wouldn't operate because it stated that the partition was locked.
Nothing with the Command Prompt is working, I have done 'bootrec /fixmbr', 'bootrec /fixboot' and 'bootrec /rebuildbcd', but the last command returns the following error:
"The requested system drive cannot be found."
I also did 'bcdboot C:/Windows' but that also refused to work. I assumed the reason for this might be because the drive didn't have a letter, but when i attempted to add a letter is says:
"The specified drive letter is not free to be assigned."
Both drives in my laptop have now been completely wiped and converted to MBR, but even with the two drives empty the original message still appears when booting my Windows USB in UEFI.
I have only had this laptop a couple of weeks and it's already completely messed up. I can boot the Windows USB in Legacy and install Windows as normal, but of course i'm looking to have it back on UEFI as it was before.
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Aug 4, 2015
If I create a DVD with Windows 10 Home and try to perform a clean install on a computer that came with Windows 8/8.1 Home pre-installed. Will Windows 10 Home recognize and accept my genuine Windows 8/ 8.1 Home Key stored in UEFI or firmware etc?
By Clean install I mean not updating but directly trying to install on a computer, on which Windows 10 have never been installed before.
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