Forum Discussion
How can I update Windows 11 23H2 to 25H2 on my pc?
Using Deployment Image Servicing and Management (DISM) to upgrade Windows 11 23H2 to 25H2 is an advanced method that involves applying a mounted Windows image (ISO) directly to your current system. It’s a powerful technique typically reserved for IT professionals, but I can outline the general steps if you're comfortable with technical procedures.
Prerequisites
- A full Windows 11 ISO (preferably the latest 25H2 version)
- Backup your important data — this method carries risks
- Administrative privileges on your PC
- Enough disk space to mount and process the ISO
How Update Windows 11 23H2 to 25H2:
1. Download the Windows 11 ISO (25H2)
Right-click the ISO file and select Mount
Note the drive letter assigned, e.g., D:\
2. Locate the install.wim or install.esd file
Usually found in D:\Sources\
Copy this file to a working directory, e.g., C:\Mount\
3. Use DISM to apply the image
Open Command Prompt as Administrator.
Run commands like:
dism /Get-WimInfo /WimFile:C:\Mount\install.wim
Apply the image (this replaces your current Windows with the new image):
dism /Apply-Image /ImageFile:C:\Mount\install.wim /Index:1 /ApplyDir:C:\
- seamon53Nov 12, 2025Occasional Reader
With the advice of chatGPT and CoPilot I've tried at many times to update 23H2 to 25H2, with no success. I always get this error : "0xC1900101 - 0x20017 The installation failed in the SAFE_OS phase with an error during BOOT operation"
SetupDiag examination of the logs does not reveal the problem. See my PDF install checklist on my Google Drive :
https://drive.google.com/file/d/1fDptp1HBiEwjeOSbvtsaif7DbfWIrpt1/view?usp=sharing
Perhaps the DISM installation is the method I've been looking for. Thanks.