Step 4. Assign the drive letter by typing below command and click Enter:

• assign letter=G:В (Note: G shall be a unique drive letter which cannot be already used.)

3. Repair the Boot Record

1. Step 1. Open Command Prompt as an administrator, enter below command:

• cd /d G:\EFI\Microsoft\Boot\ (Note: G is the drive letter you signed to UEFI partition and remember to replace G with UEFI’s partition letter)

• Enter exit when the process completes.

1. Step 2.В To repair the Boot Record, open CMD and enter below command line:

• bootrec /fixboot

• Enter exit when the repair process completes.

4. Rebuild the BCD Store

Step 1. Type each command line and hit Enter each time:

• ren BCD BCD.old
• bcdboot C:\Windows /1 en-us /s G: /f ALLВ (Note: c:\ is the drive where Windows 10/8.1/8 is installed on.)

Step 2. Type exit in Command Prompt when the process completes and then restart your PC.

Now UEFI boot is fixed, and Windows 10/8/7 can be boot up on your PC again.

Method 3. Change BIOS SettingsВ

You need to select the boot mode according to the type of disk on your system.В If you want to start an MBR system disk, you can select Legacy support instead of UEFI in boot mode.В To start a GPT system disk, you need to select UEFI.

How to access BIOS:В Common keys to enter the BIOS are F1, F2, F10, Delete, Esc, as well as key combinations like Ctrl + Alt + Esc or Ctrl + Alt + Delete, which are more common on older machines.В You can enter the BIOS interface by holding down any of these keys while booting up on your computer.

Method 4. Add Disk Driver toВ Repair Windows 10 Boot

When you replace the RAID with a different machine or replace the original SATA or IDE disk with a newer NVMe SSD, you may encounter problems starting up. You can use the following Windows command line to add the driver to the restored Windows image manually.

Dism /Image:X: /Add-Driver /Driver:»y:\z.inf»

Note: X: is the disk character of the restored Windows boot partition, and in double-quotes is the location of the driver. Inf file.

Method 5. Change the SATA Mode for Windows 10 Startup Repair

After the older XP system restores, a blue screen or cycle start may occur, you can change to IDE mode to try to start.

If you run into boot problems after upgrading from an older HDD to a newer SSD, check to see if the BIOS is set to boot for AHCI. If you set it up for RAID mode, make sure the correct RAID driver is added to the cloned system.

To Sum Up

Windows 10 boot repairВ is a rather complicated problem. There are different solutions for different causes and problems. The above approaches only apply to common UEFI boot issues. If none of them can repair UEFI boot error in Windows 10, you can contact our technical support team to get specialized services for system boot issues.

If you don’t want to risk losing or overwriting your important data during the fixes for Windows 10 boot repair, you can recover data from a PC/laptop hard drive that won’t bootВ with EaseUS Data Recovery Wizard, a renowned data recovery tool on the market.

Windows 10 Boot RepairВ FAQs

The following four questions are highly relevant to UEFI boot repair. Check the answers to get you through.

1.В How do you repair Windows 10 if it does not boot?

For Windows 10 UEFI boot repair, you can perform an automatic startup repair or using command prompt to complete. The step-by-step instructions are given each part, check the guides carefully.

2. How do I repair Win10?

To repair Windows 10 boot, you can use the Startup Repair tool. To access Windows 10 recovery environment, turn your computer on and off three times. While booting, ensure you turn off the computer when you see the Windows logo. After the third time, Windows 10 will boot into diagnostics mode. Click «Advanced options»В when the recovery screen appears. Then, choose «Startup Repair» and follow the on-screen institutions to do it.

3. How can I repair the Windows 10 UEFI bootloader?

To fix Windows 10 UEFI boot problem:

• Insert the Media (DVD/USB) in your PC and restart
• Boot from the media
• Select Repair Your Computer
• Select «Troubleshoot»В >В «Advanced Options»
• Choose Command Prompt from the menuВ and use the dispart command lines: Type and run the command: diskpart. Type and run the command: sel disk 0. Type and run the command: list vol

4. How do I fix a boot startup problem?

There are many effective solutions to fix Windows 10 startup issue and repair your EFI Bootloader. You can:

• Use the Startup Repair tool
• Use Diskpart in Command Prompt
• Fix BCD errors
• Add startup item
• Change BIOS settings
• Add disk driver
• Change SATA mode
• Fix MBR
• Restore and repair system partitions
• more fixes.

Восстановление загрузчика Windows 7 вручную при помощи утилит bootrec.exe и bcdboot.exe

Много лет компания Microsoft улучшала систему восстановления операционной системы Windows, и в Windows 7 и Windows Vista она работает практически в автоматическом режиме. Если вы загрузитесь с установочного диска Windows 7 и щелкните «Восстановление системы» («Repair Computer»), система восстановления Windows будет запущена и самостоятельно попытается исправить все ошибки, которые она найдет. Она способна исправить большое количество проблем, однако, вполне вероятна ситуация, когда оказывается поврежден загрузчик, и с этой проблемой система восстановления не может справиться. В этом случае можно восстановить загрузчик вручную при помощи утилиты Bootrec.exe.

Приложение Bootrec.exe служит для исправления ошибок, связанных с повреждением загрузчика и, как следствие, невозможностью запуска операционных систем Windows 7 и Windows Vista.

Последовательность действий

1. Настройте параметры BIOS таким образом, чтобы первым устройством загрузки был DVD-привод
2. Вставьте установочный компакт-диск с Windows 7 и загрузитесь с него до этого окна: