Windows 8 and 8.1 Forums


When Secure Boot Fails - System Repair broke my Windows

  1. #1


    Posts : 187
    Windows 8 64 bit

    When Secure Boot Fails - System Repair broke my Windows


    I had a problem where I was running UEFI with secure boot disabled and dual booting with Linux Mint which is UEFI compliant. Mint had installed Grub, Mint's boot manager but I don't like Grub so i installed rEFInd. Unlike Grub rEFInd has support for UEFI and should have worked better as a boot manager. But it gave me problems too. So I had Grub and rEFInd both installed. I could boot to both Mint and Windows but the boot managers, both Grub or rEFInd, would not show at startup like they are supposed to. I had to boot the PC, then hit Escape getting into my options menu built into the system, hit F9 to get a list of boot options where i could then choose to boot from hard drive, cd rom, usb etc. rEFInd was in this list. Only after choosing rEFInd from here, was I able to open rEFInd and choose Windows or Mint. This is way too many steps to boot into an OS, so i thought i'd try to use the system repair disk to repair my master boot record or the EFI data that the system uses at boot under UEFI. I forgot that i had to run some additional commands under command prompt and just ran automatic repair from Advanced instead.

    At this time Windows had no trouble working at all with secure boot enabled if I really needed windows to use secure boot.

    It said it found but could not fix the errors. Suddenly, Windows would not boot even with secure boot enabled. I reran the tool 3 times and it didn't help so i wiped the drive and reinstalled Windows from a clean state. I really did not have errors on the system to begin with accept that the system was trying to access my boot managers in an odd manner.. although i could get everything to work.

    The automatic repair option should not have made things worse, even breaking my secure boot but it did.

    My point of this is to show that the repair disk tools and how they play with the EFI boot tools is buggy and it can break your system even if there is nothing wrong with Windows and it's ability to boot under secure boot. Don't trust the Repair Disk tool folks. Don't trust UEFI. Don't trust Secure Boot. Be smart. Install a clean system under Legacy Bios mode with UEFI and secure boot disabled.

      My System SpecsSystem Spec

  2. #2


    Adelaide
    Posts : 1,338
    Windows 7 Ultimate SP1 (64 bit), Linux Mint 17.1 MATE (64 bit)


    Did you check the settings in your GRUB config files?

    My GRUB (from Linux Mint 14 MATE install) wasn't auto booting the selected OS (W7).
    The countdown time was set, but one of the other options disabled it.
    Once I changed that option, everything worked as expected.
      My System SpecsSystem Spec

  3. #3


    Posts : 187
    Windows 8 64 bit


    Quote Originally Posted by lehnerus2000 View Post
    Did you check the settings in your GRUB config files?

    My GRUB (from Linux Mint 14 MATE install) wasn't auto booting the selected OS (W7).
    The countdown time was set, but one of the other options disabled it.
    Once I changed that option, everything worked as expected.
    Once I installed rEFInd I could not even access grub unless I did it from rEFInd's menu. I didn't try that option but should have. No matter though, how messed up my grub or rEFInd configuration was running that tool should not have broken things for windows running under secure boot.

    Mint has some type of UEFI compatibility and so does rEFInd. Grub is MBR only. The beauty of rEFInd when it works properly is it has the ability to see a UEFI system and a MBR system ind give you the option to choose between them. No other tool can do this. I suspect the repair disk saw something in either Mint's or UEFI's compatibility and balked at it.. but it should not have messed up secure boot because secure boot was disabled at the time. Secure Boot had been disabled during this entire process so nothing in secure boot could have been corrupted for the repair disk to try to fix or mess with it.
      My System SpecsSystem Spec

  4. #4


    Adelaide
    Posts : 1,338
    Windows 7 Ultimate SP1 (64 bit), Linux Mint 17.1 MATE (64 bit)


    Do you have the Windows System Reserved partition?

    Most of the GRUB problems I have seen discussed on SevenForums, seem to be related to the Windows System Reserved partition.
    I always pre-partition my HDDs, so I never get that WSR partition and GRUB has always worked (apart from the auto boot incident).

    I don't have UEFI though and I don't know anything about rEFInd.
      My System SpecsSystem Spec

When Secure Boot Fails - System Repair broke my Windows
Related Threads
I have a Windows 8.1 Update 1 ISO and would like to use it to perform a clean install on a system which supports UEFI Secure Boot but has no optical drive. What would be the best way to approach this? WIMBoot would be nice to have as well, if there's a way to do it without making things too...
Hello everybody. 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...
Laptop: Dell Inspiron 17RSE 7720 | 3rdGEn i7 3610QM CPU | DDR3 2x4GB RAM 1600MHz | nVidia 3DVision Enabled 17-inch screen running on 2GB GDDR5 nVidia 650M GT (3D enabled with NO optimus) SATA Mode: AHCI Hard Disks: 1. 32GB mSATA boot drive (Only windows core files and programs installed on it)...
Solved System Repair Disc Fails to Boot in Performance & Maintenance
I have Windows 8 64 bit Pro Edition working fine using UEFI boot from a SSD disk. I've twice created a system repair disk on DVD but when I use boot override in the BIOS to boot from the DVD, I get the message "Non-system disk.....What might be the problem?
Ubuntu Pastebin This is the log. It was only installed last week but it was working fine. I just tried to boot into Windows and it just goes to diagnostic, but fails. I tried advanced options like 'refresh the computer' but that fails and no changes are made. I tried advanced option system...
Source A Guy
Solved Windows 8 Repair Install Fails in General Support
I installed Windows 8 Consumer Preview on a small partition on my hard drive. However, I later realized that I would need more space to move some files I needed onto it. I shrunk my Windows 7 partition and used GParted Live to expand my Windows 8 Partition, as the built in windows partition manager...
Eight Forums Android App Eight Forums IOS App Follow us on Facebook