Such a limitation is not enforced by the Linux kernel, but can depend on which boot loader is used and/or how the boot loader is configured. The Windows limitation should be considered if the user wishes to boot Windows and Linux from the same disk, since installation procedure of boot loader depends on the firmware type and disk partitioning configuration. In case where Windows and Linux dual boot from the same disk, it is advisable to follow the method used by Windows, ie. either go for UEFI/GPT boot or BIOS/MBR boot. See for more information.
Windows 7 loader uefi
Most of the linux bootloaders installed for one firmware type cannot launch or chainload bootloaders of the other firmware type. That is, if Arch is installed in UEFI/GPT or UEFI/MBR mode in one disk and Windows is installed in BIOS/MBR mode in another disk, the UEFI bootloader used by Arch cannot chainload the BIOS installed Windows in the other disk. Similarly if Arch is installed in BIOS/MBR or BIOS/GPT mode in one disk and Windows is installed in UEFI/GPT in another disk , the BIOS bootloader used by Arch cannot chainload UEFI installed Windows in the other disk.
The only exceptions to this are GRUB in Apple Macs in which GRUB in UEFI mode can boot BIOS installed OS via appleloader command (does not work in non-Apple systems), and rEFInd which technically supports booting legacy BIOS OS from UEFI systems, but does not always work in non-Apple UEFI systems as per its author Rod Smith.
However if Arch is installed in BIOS/GPT in one disk and Windows is installed in BIOS/MBR mode in another disk, then the BIOS boot loader used by Arch CAN boot the Windows in the other disk, if the boot loader itself has the ability to chainload from another disk.
The recommended way to setup a Linux/Windows dual booting system is to first install Windows, only using part of the disk for its partitions. When you have finished the Windows setup, boot into the Linux install environment where you can create and resize partitions for Linux while leaving the existing Windows partitions untouched. The Windows installation will create the EFI system partition which can be used by your Linux boot loader.
This section explains how to : install a linux bootloader on a partition instead of the MBR ; copy this bootloader to a partition readable by the windows bootloader ; use the windows bootloader to start said copy of the linux bootloader.
You can then proceed with partitioning, depending on your needs. The boot loader needs to support chainloading other EFI applications to dual boot Windows and Linux. An additional EFI system partition should not be created, as it may prevent Windows from booting.
The following assumes GRUB is used as a boot loader (although the process is likely similar for other boot loaders) and that Windows 10 will be installed on a GPT block device with an existing EFI system partition (see the "System partition" section in the Microsoft documentation for more information).
By convention (and for ease of installation), Windows is usually installed on the first partition and installs its partition table and reference to its bootloader to the first sector of that partition. If you accidentally install a bootloader like GRUB to the Windows partition or damage the boot record in some other way, you will need to use a utility to repair it. Microsoft includes a boot sector fix utility FIXBOOT and an MBR fix utility called FIXMBR on their recovery discs, or sometimes on their install discs. Using this method, you can fix the reference on the boot sector of the first partition to the bootloader file and fix the reference on the MBR to the first partition, respectively. After doing this you will have to reinstall GRUB to the MBR as was originally intended (that is, the GRUB bootloader can be assigned to chainload the Windows bootloader).
Firmware boot manager (fwbootmgr) elements are not recognized properly.They are decoded as "unknown_app_element" but are editable.Default fwbootmgr elements are:a) display order - can be edited (first loader listed is the default loader for firmware UEFI)b) timeout (value decoded as TestToFail enumeration) - timeout can be set only between 0-4
In this article, we will learn how to repair the Windows bootloader on a modern computer that uses UEFI instead of a classic BIOS and GPT disk partition table (instead of MBR). The corruption of the Windows bootloader can occur after installing a second OS (in Dual Boot configurations), file system corruption, incorrect actions during Windows recovery, removal of some data on hidden partitions, malicious software (virus, ransomware, etc.), and for some other reasons. (adsbygoogle = window.adsbygoogle []).push();
Contents: Windows Boot Error: Boot Configuration Data is Missing (EFI\Microsoft\Boot\BCD)
Automatic Windows Bootloader Repair with WinRE
Using BCDBoot to Manually Repair EFI Bootloader in Windows
A UEFI computer with Windows installed in native mode will not be able to boot if the Windows EFI bootloader is corrupted. When trying to boot from a disk with a damaged or missing EFI bootloader, the following BSOD (Blue Screen of Death) error appear:
This error indicates that the Windows bootloader configuration (Boot Configuration Data, BCD) has been corrupted or even completely removed. If you try to repair the bootloader on a UEFI computer using bcdedit tool, you will receive an error: var quads_screen_width = document.body.clientWidth;if ( quads_screen_width >= 1140 ) /* desktop monitors */document.write('');(adsbygoogle = window.adsbygoogle if ( quads_screen_width >= 1024 && quads_screen_width = 768 && quads_screen_width
You need to use the BCDBoot.exe tool to restore bootloader files and fix the boot records on the EFI partition by copying them from the system directory on the Windows partition. The BCD bootloader configuration is recreated using the %WINDIR%\System32\Config\BCD-Template file.
Delete the current BCD configuration file by renaming it (this will keep the old boot configuration as a backup): ren BCD BCD.bakUsing the bcdboot tool, you need to copy the critical files of the UEFI boot environment from the system directory to the EFI boot partition and recreate the BCD bootloader config file:bcdboot C:\Windows /l en-us /s k: /f ALL
The Windows Boot Manager section must contain the path to the EFI partition (=\Device\HarddiskVolume5 ) and the path to the boot manager file (bootmgfw.efi). The Windows Boot Loader section contains the Windows partition info and the path to the Windows EFI bootloader ( \Windows\system32\winload.efi). When you turn it on, your computer will pass control to the EFI bootloader, which will start the Windows bootloader.
Now you need to restart your computer and disconnect the bootable media. If you did everything correctly, the Windows Boot Manager should appear in the list of bootable devices, where you can choose a desired operating system to boot. Your EFI bootloader and BCD configuration have been restored successfully!
Please disregard my previus comment. The issue was solved by replacing / with \ on the last command!!!At first i wrote bcdboot c:/windows /l en-us /s /k: /f ALL instead of bcdboot c:\windows /l en-us /s /k: /f ALLEven a wrong backslash counts!!!
if your os is corrupted, you could have use windows 10 setup ISO on a usb and repaired it by using DISM command from the command prompt and targeted C: by using the install.wim as your source to fix it .
Update*** bootrec /rebuildbcd Successfully Scanned windows Installations. [1] C:\Windows Add installation to Boot List? Yes/No/ALL The requested system device cannot be found. x:\Sources>
Update *** NEW ERROR** Set the correct Partition... Tried and failed apperently did the following diskpart sel disk 0 list vol sel vol 2 assign letter f: cd /d f:\EFIMicrosoft\Boot bootrec /fixboot ren BCD BCD.Backup bcdboot c:\windows /1 en-us /s f: /f ALL Restarted Computed wo boot disk and now Error shows file\EFI\Microsoft\Boot\BCD error code 0xc000000f
****Update Attempting to repair boot problem Deleted BCD.old,BCD.temp,BCD.tmp off of c:\windows\boot (previous attempts) did x:sources>bootrec.exe /fixmbr operation completed sucsessful
Hi, Whoever wrote this post i am thanking them very much. it was create content and fixed lot of effort instead of going new windows installation.AS you have MENTIONED, i have used three tools bcdedit, EasyUEFI, BOOTICEx64. I have mistankly remove the main bootrecord.
Alhamdulillah. Terima Kasih Atas tips dan panduan nya. Berkat Cara ini, saya akhirnya tidak jadi install ulang windows 10 di komputer desktop saya. Saya bersyukur bisa menemukan cara berharga ini sehingga menjadi penyelamat hidup saya. Sekali lagi, terima kasih atas tips dan panduan nya. Sukses selalu.
I followed tutorials all day,im not joking. 6+hrs Burning hirens boot cd and using partitioning tools, the mbr tools. Installing grub just to try and get into windows.. Turning UEFI to legacy, and back. Trying different bbs options in the bios. Loads of things..Every other website was listing /fixmbr etc which resulted in the access denied.
Dism /Unmount-Wim /MountDir:c:\Mount /commitNote To avoid an unmount operation failure, close any command windows or any explorer windows that are open in the C:\Mount folder or in the subfolder of the C:\Mount folder. 2ff7e9595c