Windows 8 - Unable To Start Due To Missing EFI Partition?
Aug 25, 2014
I accidentally deleted the EFI partition, required to boot into my Win 8.1 installation - unbeknownst to me that EFI partition was on a different disk to where my Windows is located. To complicate matters the Windows install is on a RAID0 array.
Windows repair using the original install media didn't work.
EasyRE didn't detect the RAID0 drive.I saw various instructions on how to reconstruct the EFI partition, but they all assumed that the EFI partition is still there, which in my case it isn't.how I can get my data off that drive and re-install Windows?
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Apr 8, 2014
My Toshiba Satellite Laptop has Windows 8. For some reason windows 8 wont load. It gets to the screen where you select which username you want. But from there its non responsive, I cant get into Windows, I cant restart to load it up in safe mode.
I got a Windows 8 disk which I had to change the bios to load it up. The cd loads but it says the automatic repair wont repair the laptop. I try to refresh windows 8 but I get a message saying the drive where windows is installed is locked. unlock the drive and try again. It also wont let me use system restore.
I try to use the reset pc option but I get a message saying unable to reset your pc, a required drive partition is missing.
At the start it gives me the option to install windows 8, I don't know whether to just do that? Is it ok to do with windows 8 already installed?
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Apr 13, 2014
I recently purchased an Asus X551 laptop with Windows 8 but straight the way uninstalled Windows 8 and installed Ubuntu (after creating a Windows 8 recovery drive just in case). I have since decided that I want Windows 8 back as I have found that I cannot use a lot of software on Linux. The laptop did not come with any form of recovery disk or installation disk, the only reminent of Windows 8 I have is the recovery USB that I created from within the OS.
When I plug in the USB and boot from it it brings up the recovery menu with options to reset the PC but when I click it it says something like - "Unable to reset PC. A required partition is missing".
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Jul 19, 2014
I was using Ubuntu 14.04 on my laptop before. Now I want to install Windows 8. I have laptop's rescue CD. I get the following error when I tried to install Windows 8 on UEFI using the rescue CD:
"Unable to reset your pc a required partition is missing".
I think I have a problem about partitions type because Ubuntu uses ext4.
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Mar 17, 2014
I have an i7 ASUS Ultrabook (HDD is 2xssd in raid0, UEFI, GPT partitions.) which is great but have an issue where wifi profiles don't retain and i'm not too concerned about retaining the data on the ultrabook so after attempting to fix the wifi profiles not saving (Have been through the driver scenario, folder permissions, sfc, etc and no joy) i'm just going to do a clean install from the recovery partition.
I started by trying the recovery methods 8 has built in, refresh the files, but fails without an error and makes no changes. Attempted to do a full restore via 8 recovery also but fails with no error also and then I realized I was actually missing the OEM options (F9 during boot doesn't allow for EMS boot to begin recovery from recovery partition like expected, just boots into normal recovery).
After installing windows 8.1 it no longer allows me to do an OEM recovery via Windows 8.1's built in recovery methods so I created a recovery USB from the recovery partition using the windows 8 tool since the AI Recovery Burner doesn't recognize the partition, the USB recovery creation did recognize the partition and allow me to create the USB recovery drive from this successfully.
When running the USB recovery, the recovery fails with "Required drive partition is missing"
I think this is because the recovery partition is actually a windows 8 partition, not 8.1, and will not work.
Seems like a lot of effort but I want to retain the OEM key and software set (because it's surprisingly not a piece of trash) so was thinking if I install windows 8 (I have an ISO and another key) over the existing 8.1 partition it may actually allow me to then do the normal recovery.
Since the recovery drive did not work I decided to clone the recovery partition and have the WIM file now, although since cloning the partition when running recovery I no longer have the option to create a recovery drive using the recovery partition, the partitions no longer show as recovery partitions in disk management but instead as OEM partitions (Not sure why this changed.)
The recovery xml configuration for REAGENTC does have the correct GUID's and offsets for the partitions although when running this in elevated cmd it results in error 3 unable to run.
Am I able to create a base recovery drive from another windows 8.1 pc and use the WIM file?
Any way to tell what partition table my created recovery drive is expecting so I can adjust the current partitions to match and perform the recovery? When I try to refresh the files from this recovery I get the error "Windows system is locked" which is why I went for the full recovery.
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Sep 15, 2014
I bought an Asus Vivobook S551LB. Paying around 1150 for it, the specs seemed good and I thought it'd be a fairly quick laptop.
Turns out... It's really slow, and freezes a lot.
It was preinstalled with Windows 8, then I updated to 8.1. I'm fairly new to anything past Windows 7 so, 8 I'm completely lost.
I deleted all the bloatware that came with the laptop but it still freezes, so my last resort is to reinstall windows.
I can't because I updated to Windows 8.1 and when I try to reset it says I'm missing a partition.
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Mar 7, 2013
I swapped the HDD with a new blank SSD in T530 and booted it with the recovery USB of windows 8. System boots from the USB and gives refresh, reset, and other options. However, when I select reset ( to fresh isntall the OS on the SSD), it fails saying a required partition is missing. What! I'm using a blank SSD, shouldn't the installer present me with options to format and use the drive rather than erring out?
Is there any better way of installing the windows 8 os on a new blank SSD using the recovery USB?
I do have gParted live USB. If nothing works, I will partition the SSD using gParted and try the Windows 8 recovery USB again.
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Mar 24, 2013
I am trying to run a reset in Windows 8. However, after rebooting into WinRE, it says that it can't reset because I am missing a required partition.
I searched for a solution to this problem. But, it looks like most people who see this error have accidentally deleted some Windows partitions. In my case, I have not altered the Windows partitions since original install.
I read another comment that suggested that it's due to the hd driver being missing and that I would have to "inject" the correct driver into winre. But, I'm not sure how to do that (or if that is really the fix).
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Jun 1, 2014
I have an ASUS VivoBook X200CA that is running a Windows 8.1 Upgrade. For about 5 months, this laptop has been running perfectly without any problems and I have managed to reset the computer many times due to certain errors and problems that have arisen from software and hardware compatibility.
Recently, I went to reset my laptop, it restarted and then it took me to the WinRE screen. I went into Troubleshooting > Advanced Options and I clicked on the Reset option. It then took me through each of the various warnings and making sure that my data was backed up and then, once I had clicked on the "Reset" button, it hung for a bit and then said "Reset has failed - Required Partition is Missing".
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May 25, 2014
Basically I installed windows 8 on an SSD and partitioned one of my 2tb drives in order to install / transfers programs and documents etc into windows 8 from the old windows 7 install. This worked perfectly, however, windows is not not letting my format the windows 7 side of the partition so i can expand and let windows 8 have the full 2tb of storage!
Windows 7 is installed on E:, I think perhaps the bootmgr may lay inside of E hence why I can't format it.
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Mar 4, 2014
System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8.1 Pro, 64 bit
Processor: AMD E-300 APU with Radeon(tm) HD Graphics, AMD64 Family 20 Model 2 Stepping 0
Processor Count: 2
RAM: 2666 Mb
Graphics Card: AMD Radeon HD 6310 Graphics, 384 Mb
Hard Drives: C: Total - 281129 MB, Free - 233356 MB; D: Total - 19850 MB, Free - 2098 MB; E: Total - 4055 MB, Free - 935 MB;
Motherboard: Hewlett-Packard, 3577
Antivirus: Windows Defender, Disabled
I am trying to build a recovery drive on a USB flash drive for Win 8.1. I have been unable to copy the Recovery Partition from the PC to the recovery drive. It appears to be disabled when I view it from the Recovery Drive. I have discovered that in Windows 8.1 the recovery partition is installed in a INSTALL.WIM file format. How do I locate the Windows 8.1 INSTALL.WIM file and how can I register the INSTALL.WIM file as the Recovery Image on my PC?
I downloaded the Windows 8.1 Enterprise evaluation kit and became totally lost.
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Jul 1, 2013
So basically, I was just messing around in file explorer trying to view hidden files and I done something, now most the start menu tiles are gone. I have tried a system restore with no succes. The files are not in the start folder either. I checked.
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Apr 24, 2013
I bought a new laptop 350gb HDD with Windows 8 64bit preinstalled (no disc came with it) however I needed win7 32bit for my job since the softwares used are only compatible with old win version. I managed to back up my Windows 8 before I partitioned my HDD into 3 drives and installed win7 ultimate 32 bit on a different partition. I remember that my Windows 8 was installed in Drive C (100GB) while I have 80+GB for Shared files on Drive E and the rest of the memory are for Drive D where I installed win 7 and I labeled each drives accordingly. At first everything was working fine on both O.S, it was giving me the dual boot option at start up but I forgot if I really have tested running both O.S. before I gave my laptop to my supervisor and asked him a favor to intall the softwares for work purposes.
My supervisor then approached me and said that there might be some incompatibility issue with the updates I have on my win7 coz some applications don't install so he asked me if its ok if he reinstalls a new win7 so I said yes since Im confident that its will work fine and I have backed up my Windows 8 anyway, in short, I left everything into his hands. Later, he then got back to me and told me every job related softwares now work except that my Windows 8 now doesnt show and yes, dual boot option is not there anymore and it boots automatically to win7 like Windows 8 is not there.
I've read some forums how to check if your O.S are still there and it could just be a boot up issue and use of Easy BCD might work. I have attached images below for your reference. Now what I'm confused of is that my Windows 8 appears to be in Drive D and win7 could be in Drive C, which I'm thinking if they were exchanged when my sup reinstalled win7 or he may have overlapped my Windows 8. Im pretty sure he knows which drive is for which O.S since I labeled them. Now Im afraid to use EasyBCD on the wrong drive and I cant approach my supervisor anymore to bother him again since he worked on my laptop for almost the whole day at work.
- if both o.s. are still intact and recognized
- why the Drive letters got mixed up and how to check which drive has which o.s coz it seems like both drives has a part of my work related applications (didn't put personal files yet on win 8 when I had both o.s installed)
- is Drive D really is my Windows 8 now?
- does Easy BCD really work
- how to use Easy BCD to get my Windows 8 to boot up to or both of them to show at start up without corrupting my work related softwares
Attachment 20900
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Mar 25, 2014
I have a problem I can not see more in the icon bar of the start screen of my windows 8.1 tried to explain to a previous restore point but without result ..... I do not want to reformat everything ...
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Nov 30, 2013
While I was messing around with my laptop, I decided to add on a fourth operating system, Arch Linux. I suppose I was pushing my luck a bit . Anyways, during the installation, I accidentally deleted the EFI system partition from my laptop, which contained the Windows Boot Manager and necessary files to boot. Great. I only made things worse by trying to troubleshoot, and broke grub as well.
I have a Windows 8 repair disk I made using the Windows 8 built in utility, but it does not boot: the computer turns on, and just hangs at the Toshiba splash screen.
I also can obviously not access the Toshiba recovery partitions, as they are booted into just like Windows itself.
I found a bootx64.efi file on one of my system's recovery partitions (Toshiba seems to have some really complex system going on) and placed it in EFIootootx64.efi. According to this site, FGA: The EFI boot process., I need to place the bkpbootmgfw.efi (on my system, that was what it was called, but I suspect boot-repair (ubuntu tool) messed something up when I was first setting up grub and the ESP and the bkp stands for backup) back onto the EFI System Partition.
Where to look for in the various Windows Imaging Format .wim and .swm files I have laying around my recovery partition(s) in order to extract the necessary EFI files. Any Windows Repair iso that works.
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Jan 20, 2014
I need to create a partition on my PC and I've followed tutorials but I always run into the same problem: Right clicking a volume in disk management only gives me a "help" option. I've connected external storage and it gives me the menu shown in the tutorials/how-tos.
Is there something I'm missing? I've followed all the steps to the letter, save for the ones that are not possible on my PC (shrink volume/etc)
Additional info: PC is an Acer Aspire V3-551 laptop
The HD was replaced a few months ago and the original OS updated to 8.1 from 8
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Sep 7, 2013
I previously had Windows 8 installed on my desktop - I've just booted to Windows 8.1 Pro Setup so I can install it on my desktop - I've formatted my hard drive from within the setup but when I try to install Windows 8.1 Pro on the partition, I get the following error message:-
'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'
What can I do now as I don't have a version of windows installed anymore...
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Apr 7, 2013
I recently shrank my had drive and made a data partition. I then did a factory restore and installed windows on the c partition. Everything seemed to go well. I now can not see the D partition. It only shows up in Computer Management. It will not allow me to do anything with it. It is calling it OEM partition. What do I need to do to recover this?
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Sep 15, 2014
I went into This Computer and went to my C: drive to attempt to clean things up and make my system run faster by compressing files to save space. Unfortunately, I clicked some of the wrong stuff and hid data that I'm pretty sure the computer thinks is important, and now my Metro tiles are missing.
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Nov 17, 2012
I just got a new laptop and tried to put the Microsoft programs in. It all went well until trying to organize the Start. My Microsoft programs (Word, Excel, Powerpoint) are all on the desktop and I've tried to pin them to Start, but I don't see the usual "pin to start" button when I right-click. I've also tried to create shortcuts and searched through the apps to pin, but none of them worked. Is there a way I can pin them?
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Oct 19, 2013
I am unable to move my boot data to another partition. Please have a look at the following picture-:
As you can see I have created a separate a partition before my C drive and formatted it.
I have used the following command to copy the boot data from my C drive to the System partition(S:)
bcdboot C:Windows /s S: /f BIOS
But as you can see C drive is still marked as "System" which means my PC isn't actually booting from drive S:.
How do I force my system to boot from drive S: and not drive C: ???
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Sep 8, 2013
Recently I bought a new Asus Netbook, it has free DOS OS, I have installed windows 8, there were 3 partioned and I selected one of the drive. The problem is my C Drive (Boot Drive) is 40GB, D Drive is 13 GB, remaining all spaces are allocated to E Drive which has DOS OS. In Disk management my E drive is showing Active System, Primary Partion. I wanted to resize my D and E Drive. I tried to delete my E Drive but getting error message like windows unable to delete E Drive. Is there any way to delete this drive.. I want to join my D and E after that I want to re partion 90 GB's 3 additional partition.
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Sep 15, 2014
I have a Windows 8 system on a SSD with about 200gb free on the left of the C: partition (left over from previous OS I dual booted). The ssd is gpt partitioned and boots using EFI.
I tried moving the partition to the left using Gparted which worked but windows wouldnt boot. I tried recreating the bcd files with no success. After doing some research I was lead to believe it was due to keys under HKLMSystemMountedDevices having the partition offset hardcoded as it would start to boot windows then crash with an error saying boot device inaccessible.
I got it booting again by moving the partition back to the correct position and recreating the bcd files again.
So are there any guides or tools that can move the partition to the left and update the relevant areas of windows so that it can boot? Or extend the partition to the left without breaking it?
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May 23, 2014
So I noticed the Start button's Windows icon is missing in my metro mode. I'm not exactly sure what it's called, but it's the multitask pane on the left side of the screen that appears when you hover over the top left corner and slide down. Rather than a Windows icon it now assumes the Accent color in PC settings.
I have some modding software installed, such as UxStyle, Aero Glass for Windows 8, and a custom theme, although this issue existed without these installed.
how to get it back. Attached are two pics, one default and one on hover.
(My keyboard has no Print Screen button and Snipping tool doesn't seem to work in Metro)
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May 3, 2013
I installed Windows 8 with the program PWBOOT in USB disk drive and some of the apps in the metro Start Screen they didn't installed. Also the Windows store app is missing so I can't download the apps from the Windows 8 store. What should I do to bring em there? I also have a Windows 8 disc. Can I write em without deleting all the third party desktop apps? If so then how?
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Aug 25, 2014
I want to partition my C Drive to install Ubuntu 14.04 so I can dual-boot with Windows 8.1. When I tried to shrink the volume it wouldn't let me got higher than 4GB even though its a 500GB drive and I have over 259GB free. From looking at it the drive seems to have a few recovery partitions one being just under 24GB. Does the number of drive partitions factor into the amount of space I can give to a partition. Also if the recovery partitions are factoring into this can I move them to another drive or just outright delete them.
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Jan 20, 2013
I have a laptop with Windows 8 installed in a 256Gb SSD. There's a 32Gb recovery partition whose purpose is to recover the drive to factory install. Since I already imaged this recovery partition to an external drive I would like to delete it and merge it to the main C partition to increase capacity. I know I can do this easily with 3rd party solutions (Easus, etc), but I'd like to do it using the Windows 8 built in Disk Management. I tried but when I right click on the 32Gb recovery partition the only option that shows up is "Help", it does not show any other option that shows for the other partitions (Shrink, etc).
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Jul 29, 2014
My brother in law has somehow deleted the Desktop tile on the start screen. How can I restore it?
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Aug 24, 2014
My parents borrowed my laptop, and somehow deleted the desktop app that brings up your desktop from the new Windows 8 start menu.
I've tried to get it back but it looks like they deleted it right from the computer, is there any way to get it back?
There is usually a big rectangle that says desktop, and when you click it your desktop comes up, but we can't seem to figure out how to find it and put it back!
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Apr 28, 2013
PC crashed, I get Toshiba splash screen at start up then nothing. With recovery stick I can get tools but cannot use them... I get either missing partition or hard drive locked message. I can get to command prompt though where it appears that the partition containing Windows is not being recognized at all...the size of the partition is not even showing up. This all started when I returned to my PC to find it unresponsive and had to power it off with the power button. PC was working fine for months after upgrading from Windows 7.
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May 18, 2014
After a upgrade from Windows 8 to Windows 8.1, I seem to have lost my ability to use the recovery partition. Every time I go and use it I get an error message Unable to reset your PC. A required drive partition is missing.
I have contacted ASUS for recovery DVD's however I was told to go to a authorized repairer to have it fixed for a fee. My last laptop was able to burn recovery DVD's but not this one.
I understand that Windows 8.1 creates a new recovery partition for itself however I did read on this forum it is possible to get it back to default settings.
Windows Recovery Environment (Windows RE) and system reset configuration
Information:
Windows RE status: Enabled
Windows RE location: ?GLOBALROOTdeviceharddisk0partition2RecoveryWindowsRE
Boot Configuration Data (BCD) identifier: ba08d678-3e5b-11e2-b26a-a34ba04e3737
Recovery image location: ?GLOBALROOTdeviceharddisk0partition5RecoveryImage
Recovery image index: 2
Custom image location:
Custom image index: 0
Partition ### Type Size Offset
------------- ---------------- ------- -------
Partition 1 System 300 MB 1024 KB
Partition 2 Recovery 900 MB 301 MB
Partition 3 Primary 372 GB 1201 MB
Partition 4 Recovery 350 MB 373 GB
Partition 5 Recovery 20 GB 373 GB
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