To back up a Windows 11 image, start with a fresh installation and use the Sysprep tool to generalize the system, avoiding Microsoft Store apps to prevent Sysprep failure. Prepare two external drives: one for storing the Windows image (minimum 8GB) and another bootable drive configured with Windows Preinstallation Environment (Windows PE). Download the Windows Assessment and Deployment Kit (ADK) and the Windows PE add-on to create the bootable USB drive.
Enter Audit Mode by pressing Ctrl+Shift+F3 at the out-of-box experience screen, disable app updates, and install desired applications for the entire system. Use Sysprep to enter Out of Box Experience (OOBE), check Generalize, and select Shutdown. Boot from the Windows PE drive, use diskpart to identify drive letters, and capture the image with the DISM command.
To apply the image on a new PC, create a diskpart script for partitioning and a batch script for applying the image. Boot the new PC from the Windows PE drive, run the diskpart script to create partitions, and execute the batch script to apply the image. This method is efficient for deploying consistent applications across multiple PCs.