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Questions tagged [secure-boot]

For questions on “Secure Boot” and “Restricted Boot” the new bios feature that is in computers with the “Windows 8” logo.

5 votes
0 answers
3k views

Kernel lockdown disallows loading of an self-compiled and self-signed in-tree kernel module

I'm having difficulties loading a kernel module that I myself compiled and signed for Secure Boot. The module in question is ec_sys, located within drivers/acpi directory of the kernel tree. I'm using ...
mdx's user avatar
  • 161
5 votes
6 answers
104k views

How to CLEAN INSTALL Windows 7 Professional 64Bit on Dell Inspiron 15R Turbo / Special Edition laptop?

I recently bought a Dell Inspiron 15R Turbo/Special Edition with following configuration: 3rd Generation Intel® Core™ i5-3210M processor, Windows 8 Single Language, English (64bit), 8GB 2 DIMM (4GB ...
Shiva's user avatar
  • 151
4 votes
4 answers
12k views

Black BIOS screen after enabling Secure Boot?

I am not sure if I have understood the underlying concept clearly. I have MSI B450M Pro board and MSI GT710 GPU based graphics card. Windows 10 installed in UEFI Boot mode on an SSD. I thought to ...
rajeev's user avatar
  • 1,708
4 votes
1 answer
7k views

How to Secure Boot EFI images signed with an installed custom key?

I've been trying to configure UEFI Secure Boot to use my own keys for a dual boot (Windows 10 + Linux) system. This system is a Dell XPS 8700 (circa 2015) with an American Megatrends firmware/BIOS, ...
rfmodulator's user avatar
4 votes
2 answers
2k views

Moving a Windows 10 SSD to external enclosure for dual boot

My laptop came with Windows 10 pre-installed using UEFI and Secure Boot on an SSD, the Windows drive encrypted with Bitlocker. I pulled that SSD and installed Ubuntu on a new SSD. I bought an ...
Robert Munn's user avatar
4 votes
2 answers
37k views

Does Enabling Bitlocker require SecureBoot?

I want to enable Bitlocker on my Windows 10 computer, but I don't want to enable Secure Boot, since it interferes with other partitions. If I enable Bitlocker without a TPM (enter password at boot), ...
TestinginProd's user avatar
4 votes
1 answer
5k views

How to disable Windows Defender Application Control once and for all?

(Please read before marking this as a duplicate, thanks.) Description I am developing my own Win32 x86_64 application which interferes heavily with the system, is able to communicate with drivers ...
new_turtle's user avatar
4 votes
4 answers
9k views

How can I disable SecureBoot when my system won't boot?

I recently upgraded from Windows 8 to 8.1 and received a warning that SecureBoot was not properly configured. I proceeded to try correcting this by installing the default keys from the BIOS and ...
JimNim's user avatar
  • 170
4 votes
0 answers
554 views

If TPM owner password set in linux, how to enter owner password in windows to enable bitlocker?

I have successfully taken ownership of, and used various features of, my tpm in linux, using tpm_takeownership and related applications. Now when I try to enter the owner password in windows to ...
bobjandal's user avatar
  • 141
3 votes
4 answers
79k views

Secure Boot State is OFF although it is turned on in UEFI Firmware Settings

Please help me the following problems: While checking system information using msinfo32, I see that Secure Boot State is OFF although I enabled it in UEFI Firmware Settings before. I also accessed ...
vancanhuit's user avatar
3 votes
2 answers
3k views

EFI sig list converter or viewer

I recently used efitools' keytool.efi to save the EFI secure boot keys from my UEFI firmware. I now have a few .esl files that contain EFI signature lists, but they are binaries, and I would like to ...
shwoseph's user avatar
  • 369
3 votes
3 answers
4k views

what is the purpose of UEFI Secure Boot?

I heard that new computers will have a "secureboot" feature built in, and that it's supposed to keep "unsigned code" from booting. I haven't seen any issue with a possibility to boot the wrong OS,as ...
ZCoder's user avatar
  • 395
3 votes
2 answers
9k views

How to install a windows guest in qemu/kvm with secure boot enabled

My host machine is archlinux and I am using virt-manager as a frontend of qemu. I just have no idea about how to enabling secure boot for windows qemu guests. I have tried using the OVMF_CODE.secboot....
Yutsing's user avatar
  • 61
3 votes
1 answer
3k views

Undo 'sbsign' on executable, remove an attached image signature

I've signed an EFI image using the sbsign utility from the sbsigntools package, for example: # sbsign --key db.key --cert db.pem \ --output /boot/efi/EFI/Grub/grubx64.efi /boot/efi/EFI/Grub/...
rfmodulator's user avatar
3 votes
2 answers
3k views

Where is the data used in secure boot process stored?

I am spent a lot of time researching and reading about this topic but I am now very confused. I have read that computer manufacturers include some Microsoft keys. For example, Microsoft Corporation ...
whitelightning's user avatar

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