https://windowsreport.com/repair-efi-bootloader-windows-11/
First, enter bootrec /scanos. Give Command Prompt enough time to finish its process. Next, type in the following commands and hit Enter after each one: bootrec /fixmbr bootrec /fixboot. If Command Prompt denies the FIXBOOT command, enter bootsect /nt60 sys. Finally, type the following: bootrec /rebuildbcd.

https://www.dell.com/support/kbdoc/en-us/000124331/how-to-repair-the-efi-bootloader-on-a-gpt-hdd-for-windows-7-8-8-1-and-10-on-your-dell-pc
Verify that the EFI partition (EPS - EFI System Partition) is using the FAT32 file system. Assign a drive letter to it (Assign a letter that is not already in use.): Type and run the command: sel vol <number of volume> Type and run the command: assign letter=<drive letter>: Type and run the command: exit. To repair the boot record: Type and run

https://woshub.com/how-to-repair-uefi-bootloader-in-windows-8/
The boot configuration data store could not be found. The requested system device cannot be found. If Windows 10/11 is installed in native UEFI mode on a GPT disk, then the Windows EFI bootloader (Windows Boot Manager) stores the boot manager and BCD configuration on a separate hidden EFI volume (100 MB in size with the FAT32 file system).The bcdedit tool doesn't see this EFI partition, and

https://www.thewindowsclub.com/how-to-repair-the-efi-bootloader-in-windows
2] Use bcdboot command. The bcdboot commands help you replace the corrupted EFI files with the new ones so that your system works flawlessly. For that, you need to enter the following command in

https://forums.tomshardware.com/faq/how-to-repair-efi-bootloader-in-windows-10.3275168/
Method 01: Using Automatic Boot Repair. The first, and probably the best, approach to repair corrupt EFI bootloader in Windows 10 is by entering into Automatic Repair mode. Here's how: Enter into Automatic Repair mode. Power on your computer, as the boot files start to load, press the reset button. Repeat the process for two more times.

https://www.youtube.com/watch?v=XW5ILtS6cmQ
This Tutorial Helps to Windows 10/11 - Repair EFI Partition00:00 Intro00:09 Boot With Bootable CD or USB00:25 Troubleshoot00:26 Command Prompt00:28 Run Multi

https://www.youtube.com/watch?v=fJevYUjrCXw
This Tutorial Helps to Recreate & Repair EFI System Partition In Windows 11 / 1000:00 Intro00:08 Boot With Bootable CD or USB00:31 Command Prompt00:33 Find S

https://www.diskpart.com/windows-11/repair-windows-11-uefi-bootloader-0725.html
Step 1. After your computer startup from the bootable USB, click "Repair your computer", and go to "Troubleshoot" > "Advanced Options" > "Command Prompt". Step 2. Please type the following orders and press "Enter" after each order. In the volume list, we need to select the volume with the label "EFI".

https://www.winhelponline.com/blog/rebuild-efi-partition-bcd-boot-files/
To format the EFI partition (Volume 3 or Y: in this example), run: format y: /fs:FAT32 /q. Type the current volume label, as seen in the DiskPart output earlier. If the current volume label is empty, simply press Enter. Click Y when prompted to proceed with the format.

https://www.easeus.com/partition-master/repair-windows-11-uefi-bootloader.html
Full steps. Fix 3. Change Boot Mode to UEFI for Windows 11. Step 1: Open Settings (Win + I), and navigate to Options > Update and Security > Recovery... Full steps. Fix 4. Convert from MBR to GPT with EaseUS Partition Master. Step 1. Prepare a disc or drive, like a USB drive, flash drive, or a CD/DVD disc

https://www.diskpart.com/articles/how-to-repair-efi-bootloader-on-a-gpt-hdd-5740i.html
If you don't have the Windows 8/8.1/10/11 installation Media, follow these steps to repair EFI/UEFI Bootloader on GPT HDD: Step 1. Restart your Windows 8/8.1/10/11 PC and tap rapidly on the F8 key before the Windows splash screen appears. Step 2. Select "Repair your computer"->"Troubleshoot"->"Command Prompt".

https://www.partitionwizard.com/news/efi-partition-is-raw-in-win10-11.html
How to Fix EFI Partition Is RAW in Windows 10/11; EFI system partition is a protective partition formatted with the FAT32 file system after you install Windows OS on a GPT disk. The partition contains many important information, such as EFI boot loaders, driver files, system utility programs, etc.

https://www.easeus.com/partition-master/restore-repair-deleted-efi-boot-partition-in-windows-10-8-7.html
How to automatically restore EFI boot partition Windows 11/10. Step 1. Open EaseUS Partition Master and click "Partition Recovery". Select the target disk with your lost partition and click "New Scan". Step 2. Wait patiently to let the software execute "Quick Scan" and "Full Scan" operation.

https://neosmart.net/wiki/fix-uefi-boot/
The built-in Automatic Repair utility, available on the Windows 8, Windows 8.1 or Windows 10 disc, might fix errors with the UEFI bootloader of your computer. In most cases, Fix #1: Use diskpart works better than Fix #2. Windows Setup CD/DVD Required! Some of the solutions below require the use of the Microsoft Windows setup CD or DVD.

https://www.digitalcitizen.life/command-prompt-fix-issues-your-boot-records/
In order to repair your EFI Bootloader, you'll first have to mount the EFI System Partition, the one that holds its files. The tool that lets you do that is diskpart so, in Command Prompt, run the following command: diskpart. Type and run the next command to select the first drive on your computer: select disk 0.

https://www.youtube.com/watch?v=CZ17JrgFFhw
Is your system not booting or has something else gone wrong with the UEFI bootloader? If so, this video will show you how to completely rebuild the UEFI boot

https://learn.microsoft.com/en-us/windows-hardware/manufacture/desktop/configure-uefigpt-based-hard-drive-partitions?view=windows-11
Click Start, right-click This PC, and then click Manage. The Computer Management window opens. Click Disk Management. The list of available drives and partitions appears. In the list of drives and partitions, confirm that the system and utility partitions are present and are not assigned a drive letter.

https://www.reddit.com/r/techsupport/comments/rb6pk9/fix_missing_boot_and_efi_partition_after_windows/
I just literally did the same thing on both my computers. On my main computer I had 500GB M.2 nvme windows 10 drive and put new 1TB M.2 nvme drive to the second slot. Installed windows 11 to the new drive and after hours of configuring moved the old 500GB nvme drive to the second computer where I had 250GB regular SSD with windows 10 installed.

https://answers.microsoft.com/en-us/windows/forum/all/steps-to-rebuild-the-uefi-boot-partition-and-for/a837e063-dddf-4631-95a5-6b45f94b6560
Everything else to get WIndows 10 started is here, including at the end a rescue install where you shrink C or a data partition to install Windows 10 to a Dual Boot, if it starts the old install you can then delete the Rescue install and use the new EFI System partition it creates:

https://www.tomshardware.com/how-to/delete-efi-system-partition-windows
How to Delete the EFI System Partition in Windows. 1. Launch Diskpart. (Image credit: Tom's Hardware) 2. Enter list disk to see a list of all the connected drives. The drive number of the drive

https://learn.microsoft.com/en-us/windows-hardware/manufacture/desktop/repair-the-boot-menu-on-a-dual-boot-pc?view=windows-11
Open a command line and use Bcdboot to add the new operating system to the boot menu (see the note below about options for how to get to a command line): Windows Command Prompt. Copy. Bcdboot D:\Windows. Where D:\Windows is the path to the new Windows installation. If you need to find the drive letter of your Windows installation, run diskpart

https://www.youtube.com/watch?v=HwH7ss-NqxY
This Tutorial helps to How to Repair Existing EFI System Partition In Windows 11/10/8/700:00 Intro00:14 Boot With Bootable CD or USB00:22 Repair Your Compute

https://superuser.com/questions/965751/how-to-access-efi-partition-on-windows-10
Open an Administrator Command Prompt window by right-clicking the Command Prompt icon and selecting the option to run it as Administrator. In the Command Prompt window, type mountvol P: /S. (You can change P: to any unused drive letter; that's arbitrary.) Use the Command Prompt window to access the P: (EFI System Partition, or ESP) volume.

https://www.easeus.com/partition-master/mbr2gpt-cannot-find-room-for-the-efi-system-partition.html
Extend System C drive with unallocated space. 1. Right-click on the System C: drive and select "Resize/Move". 2. Drag the system partition end into the unallocated space so to add it to the C: drive. And click "OK". 3. Click "Execute Task" and "Apply" to execute the operations and extend the C drive. Option 2.

https://www.elevenforum.com/t/getting-a-winload-efi-error-0xc0000225-after-deleting-the-partition-where-windows-11-was-installed.26263/
About. Windows 11 Forum is dedicated to helping you find support and solutions for any problems with your Windows 11 PC, we also provide an extensive Windows 11 tutorial section that covers a wide range of tips and tricks.. Our forum is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation.

https://www.diskpart.com/articles/invalid-partition-table-windows-7-1796.html
The Best Windows Disk Partition Manager and PC Optimizer. Free Download. Windows 11/10/8.1/8/7. Step 1. Install and run it to a normal Windows computer with the same system on yours, like Windows 7. Step 2. Connect a USB flash drive with the PC, and execute the program. Select Make Bootable Media under Tools.

https://www.windowscentral.com/software-apps/windows-11/windows-11-2024-update-version-24h2-common-problems-and-fixes
Update Troubleshooter. To fix the "Windows Update" mechanism to upgrade to version 24H2, use these steps: Open Settings. Click on System. Click the Troubleshoot page on the right side. Click the

https://answers.microsoft.com/en-us/windows/forum/all/windows-doesnt-upgrade-from-10-to-11/fd6d41d7-997a-410c-a400-aff41449fc29
To address the Windows upgrade issue, we recommend following these steps: Press the Windows key + R, type "msconfig," and press Enter. In the System Configuration window, go to the "Services" tab and check "Hide all Microsoft services." Click "Disable all," then go to the "Startup" tab and click "Open Task Manager."

https://arstechnica.com/civis/threads/windows-10-failed-to-install-an-update-error-0x80070643.1501309/
In Disk Management I can see a rather large 664MB partition on the system drive but it doesn't have the Recovery Partition label, I can't "explore" it, and one doesn't show up in the Volume column

https://www.msn.com/en-gb/news/techandscience/how-to-fix-those-pesky-windows-can-t-be-installed-to-this-disk-errors/ar-BB1nE6xX
Press Shift + F10 to open Command Prompt. Type the following command and press Enter: diskpart. Enter the following text and press Enter again: list disk. You'll see a list of physical drives on