Installer Windows manuellement en UEFI

Guide: Installing Windows on UEFI Mode / GPT

This guide outlines the process for installing Windows in UEFI mode with GPT partitioning. If you're using Windows 7 or Vista, you can use ImageX instead.

Prerequisites

A Windows Bootable USB Installer or Windows PE environment.
A machine with UEFI enabled in the BIOS/UEFI settings.
The install.wim or install.esd file from your Windows installation media.

Steps to Install Windows in UEFI Mode with GPT

1. Boot into WinPE or Windows Bootable Installer

Insert your Windows installation USB and boot from it.

2. Open Command Prompt

Once the Windows Installer loads, press SHIFT + F10 to open the command prompt.

3. Disk Partitioning

Use diskpart to configure the disk.
```
diskpart
```

4. Select the Target Disk

List all disks available.
```
list disk
```
Select the disk you want to install Windows on (replace # with your disk number).
```
select disk #
```

5. Clean the Disk

Clean the selected disk to remove any existing partitions.
```
clean
```

6. Convert to GPT Partition Scheme

Convert the disk to GPT (GUID Partition Table) style.
```
convert gpt
```

7. Create the EFI System Partition

Create a 512 MB EFI system partition (required for UEFI boot).
```
create partition efi size=512
```

8. Format the EFI Partition

Format the EFI partition with the FAT32 filesystem.
```
format quick fs=fat32
```

9. Assign a Letter to the EFI Partition

Assign a drive letter (e.g., Z:) to the EFI partition.
```
assign letter=Z
```

10. Create a Primary Partition

Create a primary partition for the Windows installation.
```
create partition primary
```

11. Format the Primary Partition

Format the primary partition quickly.
```
format quick
```

12. Assign a Letter to the Primary Partition

Assign a drive letter (e.g., W:) to the primary partition.
```
assign letter=W
```

13. Exit DiskPart

Exit the disk partition tool.
```
exit
```

Apply the Windows Image

14. Locate the `install.wim` or `install.esd`

Navigate to the USB drive containing the Windows installation files (adjust the drive letter accordingly).
```
D:
cd sources
```

15. Get Image Information

Check the available Windows editions in the install.wim or install.esd file.
```
dism /get-imageinfo /imagefile:install.wim
```
If you have an install.esd file, use this command instead:
```
dism /get-imageinfo /imagefile:install.esd
```

16. Select the Edition to Install

Identify the edition you want by checking the index number in the output from the previous command.

17. Apply the Windows Image

Apply the selected image (replace X with the edition index number).
```
dism /apply-image /imagefile:install.wim /index:X /applydir:W:
```

18. Set Up the Bootloader

Use bcdboot to set up the boot files for UEFI.
```
bcdboot W:\Windows /s Z:
```

Conclusion

You have now successfully installed Windows in UEFI mode with GPT partitioning. Restart your computer, and Windows should boot up from the newly installed disk.

If you encounter any issues or need more help, feel free to consult the official Microsoft documentation.