I have Windows 8 pre-installed, and then I installed GRUB with Ubuntu. Ubuntu is not my thing, so now I want to remove it along with GRUB. From what I have learned, with UEFI, GRUB does not overwrite the windows bootloader in the EFI partition and is stored elsewhere. How would I remove GRUB and make my PC use the Windows bootloader instead? It should be noted that I created a separate /boot partition when installing Ubuntu.
Enter powershell into the windows search of the start menu. Look for a blue icon with the label "Windows PowerShell", right click on the that and select "Run as Administrator" within the context menu.
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You can restore the Windows bootloader with a Windows 8/8.1 DVD. These instructions are inspired by Manindra Mehra's answer, but I expanded it with full working details (verified with a Windows 8.1 DVD).
In order to boot on windows I have to press F11 to enter into the UEFI menu and select Windows Boot Loader. If I do not enter the UEFI I get a black screen with the message: Reboot and select proper boot device.
You should also specify the topmost Windows boot loader application in the Windows Boot Manager display order. The following example shows how to put a specified Windows boot loader at the top of the display order.
A multiboot system that has multiple installed operating systems has multiple instances of the Windows boot loader. Each instance of the Windows boot loader has its own identifier. You can set the default Windows boot loader ({default}) to any of these identifiers.
A BCD store has at least one instance, and optionally multiple instances, of the Windows boot loader. A separate BCD object represents each instance. Each instance loads one of the installed versions of Windows that has a configuration that the object's elements have specified. Each Windows boot loader object has its own identifier, and the object's device and path settings indicate the correct partition and boot application.
To simplify BCDEdit commands, you can specify one of the Windows boot loaders in the BCD system store as the default loader. You can then use the standard identifier ({default}) in place of the full GUID.The following example specifies the Windows boot loader for EFI as the default boot loader, assuming that it uses the identifier GUID from BCD-template.
For the Windows boot loader for EFI, both elements are usually set to the drive letter of the Windows system partition. However, if BitLocker is enabled or a computer has multiple installed versions of Windows, osdevice and device might be set to different partitions.BCD-template sets both elements to drive C, which is the typical value. You can also explicitly set the osdevice and device values, as shown in the following example. The example also assumes that you have specified the Windows boot loader for EFI as the default boot-loader object.
The path element of a Windows boot loader specifies the location of the boot loader on that volume. For UEFI systems, path indicates the Windows boot loader for EFI, whose path is \Windows\System32\Winload.efi.
However, it did "something" that makes the UEFI firmware immediately select the Windows Boot Manager rather than GRUB on power-up. The only way to boot Linux now is to use the BIOS boot manager (F11 on my BIOS) and select the GRUB boot loader manually.The UEFI BIOS knows that there are multiple bootable installs on the UEFI partition, because I can choose between them in the boot manager.However, when I'm in the setup menu in the UEFI BIOS, it just lets me choose "UEFI boot my internal drive" in the boot priority selection -- it doesn't let me choose which particular boot loader on that partition to use. And, by default, it chooses Windows, not GRUB.
The firmware boot loaders boot the UEFI environment and hands over control to UEFI applications written by the SoC vendor, Microsoft, and OEMs. These applications can utilize UEFI drivers and services.
The SoC firmware boot loaders initialize the minimal set of hardware required for the device to run. The SoC firmware boot loaders are designed to finish as fast as possible, and nothing is drawn to the screen while they're running. After the SoC firmware boot loaders finish, the device is booted into the UEFI environment.
The SoC firmware boot loaders also contain an emergency flashing capability that allows devices to be flashed when the boot environment isn't stable and Full Flash Update (FFU) image-based flashing using the Microsoft-provided flashing tool isn't possible. Emergency flashing requires tools specific to the SoC. For more information, contact the SoC vendor.
Windows 10 utilizes the Unified Extensible Firmware Interface (UEFI) to support the handoff of system control from the SoC firmware boot loader to the OS. The UEFI environment is a minimal boot OS upon which devices are booted and the Windows 10 OS runs. For more information, see UEFI in Windows.
OK. So I used VeraCrypt to encrypt the system partition and now Windows boots its automated repair only. After the repair in what I think is Windows Recovery Environment I can choose to boot off USB and THERE I can choose to boot the VeraCrypt loader.
I used BOOTICE (latest version) to modify the UEFI boot entries to boot the VeraCrypt loader in the first place by choosing "Active", "Boot this entry next time" and by placing VeraCrypt in the first position on the list using the "Up" button. When I restart the PC, UEFI boots the VeraCrypt Loader as it should but when I switch off the PC and on again, UEFI boots to the Windows Boot Manager which loads the Windows Automated Repair again.This description is probably somewhat inaccurate because I don't exactly know how UEFI booting works [recommend me a good read ;)]. Obviously in my UEFI (in BIOS) I can't find the VeraCrypt boot option, there's only the Windows Boot Manager and EFI shell to choose from. How do I insert the VeraCrypt loader there? I have secure boot disabled.
I also tried to use Windows BCDEdit cmdlet but it is a no go (it does not see the VeraCrypt loader). Neither is Visual BCD Editor. My system is MSI H81-P33 & i5-4690K with the latest BIOS. Only BOOTICE somehow works.
OK, I came up with a solution and it works even after I switch off the computer. In BOOTICE I modified the Windows Boot Manager to load "\EFI\VERACRYPT\DCSBOOT.EFI" (the VeraCrypt loader) instead of the original Windows loader (\EFI\MICROSOFT\BOOT\BOOTMGFW.EFI) and saved it. I only modified "Media file:" text field in BOOTICE. When I reopened BOOTICE to see if the change sticked I noticed that there are now 2 separate Windows Boot Manager entries: the original (which I presume Windows automatically recreated after I changed it) and the one I changed with the VeraCrypt loader path.
If it fails one pass, do it again. It should pass the 2nd + attempt. If not boot via rescue disk. This is because UEFI doesn't recognize the location or the file itself "veracryptb", the bootloader, in the hard disk as "trusted."
NB: Secure boot must be off permanently because the Veracrypt signature does not reside in a separate UEFI secure boot table in firmware. You can generate one and enter it, as described in the Veracrypt forum or run without secure boot. I suggest leave SECURE BOOT OFF as the Veracrypt signature generating script has bricked some UEFI/BIOS. A malware bootloader cannot run in the UEFI because to boot, it must be added to trusted list which can be done only with SECURE BOOT ON to edit the boot file trusted list; malware cannot do that without the UEFI Admin password to change the UEFI settings from SECURE BOOT OFF. So far, rootkit malware cannot run below or at the UEFI preboot level, as we know today, to hack the admin password in UEFI, so it remains secure even with SECURE BOOT OFF. With SECURE BOOT ON, if the malware signature adds itself to the trust list it still does not exist in SECURE BOOT table in firmware so cannot run. However, Veracrypt has a script to add its signature to the firmware trust table [ with mixed results] so its possible for malware to do the same with SECURE BOOT ON. Malware may boot if its tries to mimic the trusted files in UEFI InsydeH20 table with SECURE BOOT OFF if InsydeH20 doesn't use signatures to secure its integrity. The prior post shows another user renamed veracryptb to Windows Boot Manager and booted, showing mimic ploy can work for the Windows Boot Manager. However its not easy to mimic the veracryptb bootloader due to the keys generated during the creation of the secure partition that is unique to each bootloader, a mimic will likely fail to boot into veracrypt. The above applies only to the INsydeH20 UEFI implementation, for your UEFI, YMMV.
For the first issue, it is unfortunately something known to happen with HP machine although with the latest changes in VeraCrypt it seems to work better on some HP machines. One way I solved the problem is to replace Windows loader by VeraCrypt and so even if VeraCrypt boot menu entry is erased, the machine would boot normally.
But in your case, even the OS bootlaoder is working, the HP BIOS refuses to boot on it. Maybe there is a security option on the BIOS used by this model that allow only loader from predefined manufacturers.
for the second issue, it looks like VeraCrypt bootloader could not initialize correctly the video mode of the machine and so it is not able to print any output. To my knowledge, this is the first time such issue is report.
Did you check the BIOS options to see if there is any advanced option to control the graphic video card behavior?
Normally, graphic card should be limited to OS and boot environement should use basic display
Also, VeraCrypt bootloader creates a file called "PlatformInfo" in the EFI system patition inside the folder "EFI\VeraCrypt". Can you please share this file (after removing any identifying information from it)? It is a simple XML file with technical details about the hardware available. 589ccfa754
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