A bootloader is a program that loads and launches a program or an operating system from boot.

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Error converting custome bootloader .img file to .iso file

I am trying to convert a bootloader I wrote in Assembly Language to iso image file. The following is the code from MikeOS bootloader BITS 16 start: mov ax, 07C0h ; Set up 4K stack space after ...
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656 views

Multi-Boot: How to repair Windows 10 boot after Linux Mint upgrade?

I have an triple-booting iMac (Linux Mint, OSX, WINDOWS 10) with rEFInd installed. The following partitions listed using sudo gdisk -l in Linux Mint 17.3: Number Start (sector) End (sector) Size ...
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127 views

Have separate bootloaders for Windows and Linux on a single hard disk?

As of now, I have a single 500GB hard disk with Windows installed first on one partition and Ubuntu installed on another partition. Since Ubuntu was installed second, it detected the Windows partition ...
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30 views

Add boot entry to MBR for USB — Non Specific to OS - Use EasyBcd Ireboot to reboot to USB

So I am toying with installing Grub and editing Grub configs from Windows to get the same end goal, but it would be easier/better to use Microsoft products since I am not dual booting Linux. The end ...
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1answer
55 views

Places or books to start learning PXE booting [closed]

I am currently playing around with PXE booting and PXELINUX/SYSLINUX. I have tried LTSP , thinmachine, FOG project and some others. Currently I am trying to understand how PXELINUX is working under ...
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1answer
66 views

android fastboot lists nothing(Debian)

hi im new to rooting and am having problems unlocking bootloader i have 2 sdks installed on system one for root which im using to root my device and on for my user for ADT bundle. when i type adb ...
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1answer
130 views

One boot menu for two OS on two separate hard drives

So here's the hypothetical situation. I have two Solid State Drives, both 250gb. I'm wanting to install windows 7/10 on one of these drives, as well as Linux Fedora Workstation on the other. Ideally, ...
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461 views

On windows 10 machine bootloader is on wrong drive

I have SSD with OS and HDD with files, but loading starts from HDD which i want to replace,but when i unplug it system wont boot(EFI console opens). I didnt do anything, installer did it ...
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46 views

Installing Linux and windows on dual boot - specific problm

I already have Linux installed on my laptop, Kali Linux 2.0 (latest) to be specific. Due to some software requirements for programming I have to install windows 10 also on my laptop as dual boot. I ...
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221 views

Can't access windows 10 when BIOS is in legacy mode

I was trying to add Ubuntu to the boot loader by using EasyBCD but realised I could only add an entry if I set legacy mode on in my BIOS. But when I rebooted I couldn't boot to windows 10. Helpful ...
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2answers
278 views

Can't boot windows from a clone of my working harddrive

My goal: Clone everything on C: to my SSD drive f:, then use the old "c:" for data. Some threads say I need GPT (on one? both?) I think it's already set to F: bedcause the convert button is gray in ...
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4k views

Repair Windows 10 boot loader

I am having trouble repairing my Windows 10 boot loader. I have tried booting into the Windows 10 installer usb and doing the Repair Start Up there. I have tried the solution suggested here: How to ...
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1answer
46 views

Arch-Win7 dual boot laptop freezes, and then is unable to boot

I have a Dell Precision laptop, with a Arch-Windows 7 dual boot, 64bits systems, GRUB2 as boot loader, and a single SSD. I found myself browsing around for reasons which I will not explain to this ...
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3k views

Windows 10 refuses to boot

Running Windows 10 upgrade on Windows 7 for months. Gigabyte mobo, AMD processor. Not sure when. May have powered down without shutdown... Windows 10 fails booting, displays the spinning dots then ...
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151 views

how to install Windows on NVMe disc and boot loader or other disc

I have a problem with NVMe disc. I need to run windows on Intel 750 NVMe disc, but my motherboard doesn't support NVMe boot. I have second sata drive. Is there any way to install windows on Intel ...
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98 views

Fixing GUID collision from Clonezilla-ing a Windows drive?

I just bought a larger SSD (256gb up from 128) and used Clonezilla to clone the smaller drive to the newer, larger drive. I cloned the "drive," and not the windows "partition." Because of this, it ...
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62 views

how to boot windows image backup?

The Windows boot loader is able to boot Windows from a full Image backup. I read that years ago, and about one year ago I even testet that myself, so I know it's true. Now that I really need to boot ...
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1answer
996 views

How to manually setup grub on a seperate boot partition with LVM over LUKS full disk encryption?

I've installed Linux Mint 17.2, with a hard drive partitioned as follows: sdc1 - 100MB ext2 for boot sdc2 - rest of disk as LUKS -> Physical Volume -> LVM Volume The logical volumes are: / ...
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1answer
80 views

What steps am I missing in my attempt to create bootable Linux distribution image?

I am trying to create a distribution image (via Linux’s dd command) for an OS that will work with hard drives and flash media. I have been successful at creating the image, but I can’t get it to boot ...
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58 views

UEFI detection (ESPs)

Does the UEFI boot manager detect the ESPs inside the GPTs on every storage device, based on the global-scope variables (boot-configuration) stored in NVRAM? Reading the UEFI booting from ...
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2answers
394 views

MBR vs GPT (Logical Block Addressing)

Going through MBR/GPT I'm a bit confused on the transition from MBR (2^32) to GPT (2^64). If you breakdown the history from CHS-to-LBA addressing: CHS (24Bits) - 8GB Limit (1979 - Introduced with ...
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2k views

Dual boot system: Grub doesn't detect Windows 10

I have a dual boot system on a Lenovo G50-45 laptop with Windows 10 and Linux Mint 17.2. It worked fine briefly but after upgrading Linux, something broke it. Below, please find my boot-repair log. ...
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1answer
47 views

Master Boot Record (Sector Size)

I understand the typical MBR is 512B and the addressable space is 2TB (2^32 x 512B), this was related to the physical sector size of the storage device (HD) which made perfect sense, but what about ...
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554 views

Boot Signature - BIOS

I understand that the BIOS is in ROM, and the manufacturer "typically" designs it to point to the first sector of the "active" storage device's first sector or CHS (0,0,1)*physical and CHS ...
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How can I delete all Windows Boot Loader entries and rescan?

I have reinstalled windows multiple times (over the last install) and it adds a new entry every time. Can I delete all Windows Boot Loader entries and rescan and just add those?
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279 views

Can I recover my HDD data after clean installing Win 7 on SSD, after the installation created System Reserved Partition in the HDD instead of the SSD?

I can't find the solution by searching the forums because I lack too much knowledge about partition tables functioning. I've found this quite similar situation Recover or recreate partition after ...
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2answers
67 views

Bootloader, uefi, bios documentation

I'm facing incredibly annoying issues with installing kali 2 (not booting + completely messing windows 7 boot) in uefi mode. I went trough alot of topics and solutions and nothing seems to work, ...
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11 views

Error while trying to ./configure (installing bootloader manager)

I'm having a problem with my bootloader - I have installed android along my other OS and if I install grub ( which comes with it ) my boot menu disappears and I can only access android through its ...
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1answer
1k views

booting windows 10 spends too long

In august 2015, I have upgrade my laptop from windows 8.1 to windows 10. But it spends always 10 minutes to boot it. It is not normal that it spends so long. What can I do for boot him faster? Below ...
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1answer
309 views

How exactly does TrueCrypt work

I have some questions about how TrueCrypt and other Encryption Software work. TrueCrypt overrides the Bootcode in the MBR. Is there any other TrueCrypt Code on the disk which is not encrypted (Chain ...
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30 views

Booting Windows and Linux across two physical drives

I'm trying to get Windows 7 and Kali Linux bootable on an old laptop, but there are a few considerations that are making it difficult: 1) Windows 7 is on an SSD, while I installed Kali on the ...
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Need help on windows 8.1

i have Dell 5548 laptop with windows 8.1 single language. Few days back due to some problem i have formatted my laptop again with Win 8.1. Thing is that- Win RE tools, GPT, MSR partitions were missing ...
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50 views

Accidentally formatted directly Drive C:. Unable to detect partition while formatting

I accidentally formatted both Drive C: (which operating system is installed) as well as Drive D: (total of 2 partitions) I an now trying to format my machine and now, unable to detect my internal ...
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2answers
503 views

Set Windows 10 Bootloader to Metro Style

I'm using Windows 10, upgrading from Windows 7. I have Ubuntu installed in my hard disk, so I want to boot Ubuntu from Windows bootloader. After adding Ubuntu to Windows bootloader, I rebooted, ...
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815 views

Force DnX Mode on ASUS Android Tablet/Intel Cloverview

I have an Asus MeMo Pad 7 (ME70CX KO1A, Intel Cloverview Chipset) which is not bootable. The device sticks at the bootloader splash screen and no button combination will force the device into ...
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21 views

Multiboot flash drive backup

I have a 16GB flash drive, formatted in FAT32 which contains multiple live linux distros, syslinux bootloader and personal data. I would like to make a backup of it and restore this backup on 64GDB ...
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29 views

How do I restore the default Windows 10 bootloader? [duplicate]

I would like to remove by Ubuntu partition by formatting its drive in the Windows Disk Manager. However, how can I restore the Windows 10 bootloader after this action? I no longer wish to use GRUB.
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301 views

Where is the UEFI boot order stored?

I know the UEFI boot loaders are stored on a FAT32 partition on my (usually GPT) drive, but where is the boot order stored? My reasoning: It can't be stored as part of the firmware settings, since ...
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2answers
355 views

HP 110-430 Desktop PC - Can't boot into anything after EasyBCD's “Write MBR”

After upgrading my windows 8.1 install to windows 10 about a week ago (week ago), I decided that I no longer wanted the Windows/Ubuntu dual boot I had setup. So, in an attempt to delete GRUB and set ...
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2answers
3k views

Repair bootloader for fedora 22 after install windows

I already have fedora 22 and windows 7 in my machine , i wanna to upgrade to windows 10 but in fact i'm afraid to losing fedora i have read the fedora documentation but still afraid to start this ...
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29 views

How do I boot to new drive?

So here's the deal. I have a laptop that came with Windows and a plethora of other partitions. I added a couple partitions after shrinking the Windows one for Linux. I'm using rEFInd for my bootloader ...
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79 views

Install arch linux when lvm on luks keyfile on usb and bootlouder on usb

'm trying to install Arch Linux in the following way: LVM is installed on LUKS when the LUKS key is image stored on USB And the botlaodr is also on additional USB For some reason, even though I did ...
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1answer
233 views

Accidentally deleted Windows 7 Boot sector / MBR

Accidentally run the following on system drive instead of USB. OS: Windows 7. 1 system partition and 1 unformatted partition. Now still haven't rebooted while writing this. On C disk root can see ...
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1answer
503 views

Can I add Windows to my systemd-boot bootloader if I have separate EFI partitions?

I've just installed Arch Linux on to a new set of partitions on my Windows 8 machine. In doing so, I created a new 512MB EFI partition for Linux to load from, leaving the existing Windows EFI ...
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1answer
406 views

Will upgrading to Windows 10 replace my grub bootloader?

I dual-boot Windows 8.1 and Ubuntu 15.04. I have learned to install Windows before Ubuntu because the reverse results in having to finagle with a lot of settings to get the grub boot loader prompt ...
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157k views

How to fix Windows 10 boot loader from Windows

I installed Ubuntu on system that has Windows 10 installed. I can boot to Windows or Ubuntu normally using GRUB. I want to delete Ubuntu partition but first I must restore Windows 10 MBR. Here ...
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2answers
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Restore Windows bootloader on Virtual Machine [duplicate]

I recently p2v'ed my old Computer into a virtual machine. Since it had a dual-boot and I only copied the Windows partition this broke GRUB. I can still boot Windows with Rescatux though. So my ...
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2answers
453 views

Dual boot Windows 8.1 and Ubuntu

I just got a Lenovo X1 Carbon and I am flabbergasted on dual booting -- having the record in the boot manager. Cliff Notes It came with Windows 8.1. I shrunk the Windows partition (within windows ...
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1answer
68 views

How to restore grub from a separate partition, to boot a luks partition?

My setup is: sda1 /boot ext2 sda2 swap swap sda3 / luks I broke the boot partition. Now when trying to boot manually, cannot figure out how to load crypto modules needed to open the root ...
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41 views

Kali won't show in grub

I am currently dual booting Ubuntu and Windows 7. After installing Kali from a DVD I restarted the computer. The problem is that Kali isn't in my BIOS boot options or in grub boot options. I have ...