How to Install Windows using DISM Apply-Image without USB or External Drive (UEFI & Legacy BIOS)
In this video, I will show you a "pro" method to reinstall Windows directly from your hard drive without needing a USB flash drive or any external media. This method uses the DISM (Deployment Image Servicing and Management) tool to apply a Windows image directly to your partition. This works for both UEFI and Legacy BIOS systems.
⚠️ EXTREME DISCLAIMER - READ BEFORE PROCEEDING ⚠️
PROCEED AT YOUR OWN RISK. This process involves formatting disk partitions and modifying the system bootloader. Incorrect use of these commands WILL RESULT IN PERMANENT DATA LOSS and can make your computer UNBOOTABLE.
I am NOT responsible for any loss of data, hardware damage, or system failure.
BACK UP YOUR DATA to an external drive before starting.
This tutorial is for advanced users who are comfortable using the Command Prompt (CMD).
Step-by-Step Instructions:
Preparation: Mount your Windows ISO and copy the install.wim (or install.esd) file to a secondary partition (e.g., D:\11\).
Boot to WinRE: Hold down Shift key and Click Restart. Navigate to Troubleshoot, Advanced Options, Command Prompt.
Format the Drive (The Notepad Trick): * Type notepad in CMD.
Go to File, Open.
Select "All Files". Right-click your target Windows partition (usually C:) and select Format. (This is faster than using Diskpart for some users).
Locate your Source: In CMD, switch to your storage drive:
D:
cd 11
Check your files using dir.
Identify Windows Edition (Index): Run this command to see which index matches your desired edition:
dism /Get-ImageInfo /ImageFile:D:\11\install.wim
Apply the Image:
dism /Apply-Image /ImageFile:D:\11\install.wim /Index:1 /ApplyDir:C:\ (Change Index number based on the list below).
Create Boot Files:
bcdboot C:\Windows
Finish: Exit CMD and click Continue to boot into your new Windows installation.
Common Index Reference (inside install.wim):
The index numbers may vary depending on your ISO, but typically:
Index 1: Windows 11/10 Home
Index 2: Windows 11/10 Home N
Index 3: Windows 11/10 Home Single Language
Index 4: Windows 11/10 Education
Index 5: Windows 11/10 Education N
Index 6: Windows 11/10 Pro
Index 7: Windows 11/10 Pro N
Index 8: Windows 11/10 Pro Education
Index 9: Windows 11/10 Pro Education N
Index 10: Windows 11/10 Pro for Workstations (Note: Always run the /Get-ImageInfo command to verify your specific file).
Key Commands Used:
notepad
dism /Get-ImageInfo /ImageFile:D:\11\install.wim
dism /Apply-Image /ImageFile:D:\11\install.wim /Index:X /ApplyDir:C:\
bcdboot C:\Windows
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🕒 Timestamps:
00:00 Preparing File
00:30 Install Windows
02:52 End
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