Introduction

In the ever-evolving landscape of software maintenance, Microsoft has introduced significant changes to the update process for Windows 11 and Windows Server 2025. These changes aim to enhance efficiency and reliability but necessitate a shift in how updates are applied. This article delves into the transition from using Windows Update Standalone Installer (MSU) files to the Deployment Image Servicing and Management (DISM) tool for installing updates.

Background: The Advent of Checkpoint Cumulative Updates

In July 2024, Microsoft unveiled "Checkpoint Cumulative Updates" for Windows 11 24H2 and Windows Server 2025. This new update mechanism was designed to:

  • Reduce Download Sizes: By delivering smaller, incremental updates, the burden on network bandwidth is lessened.
  • Accelerate Installation Processes: Smaller updates translate to quicker installations, minimizing downtime.
  • Alleviate Server Load: Efficient update distribution reduces strain on Microsoft's servers, enhancing overall service reliability.

Challenges with MSU Files

Despite the advantages of Checkpoint Cumulative Updates, users encountered issues when manually installing updates using MSU files. Reports indicated that such installations often failed, displaying an "Operation is not supported" error message. Microsoft identified the root cause as conflicts arising when Features on Demand (FoD) or Language Packs (LP) were installed from local sources without connectivity to Windows Update or Windows Server Update Services (WSUS). (neowin.net)

Microsoft's Revised Guidance: Embracing DISM

In response to these challenges, Microsoft updated its support documentation, advising against the manual installation of MSU files. The revised guidance emphasizes the use of the DISM tool for applying updates. DISM offers a robust command-line interface for servicing and preparing Windows images, making it a more reliable method for update installation. (neowin.net)

Technical Details: Utilizing DISM for Update Installation

To install updates using DISM, follow these steps:

  1. Download the Update Package:
  • Visit the Microsoft Update Catalog.
  • Search for the desired update using its Knowledge Base (KB) number.
  • Download the corresponding INLINECODE0 or INLINECODE1 file suitable for your system architecture.
  1. Open Command Prompt with Administrative Privileges:
  • Press INLINECODE2 and select "Command Prompt (Admin)" or "Windows Terminal (Admin)".
  1. Install the Update Using DISM:
  • For INLINECODE3 files:

``INLINECODE4 `INLINECODE5 .cabINLINECODE6 `INLINECODE7 `INLINECODE8 C:\Path\To\Update` with the actual path to the downloaded update file.

  1. Restart the System:
  • After the installation completes, restart your computer to apply the update.

Implications and Impact

The shift to DISM for update installations carries several implications:

  • Enhanced Reliability: DISM provides a more controlled and error-resistant environment for applying updates, reducing the likelihood of installation failures.
  • Streamlined Processes: For IT administrators, DISM facilitates batch processing and automation, improving efficiency in managing multiple systems.
  • User Adaptation: End-users accustomed to the simplicity of double-clicking MSU files must adapt to using command-line tools, which may require additional learning.

Conclusion

Microsoft's transition from manual MSU installations to the DISM tool reflects a commitment to improving the Windows update experience. By adopting DISM, users and administrators can achieve more reliable and efficient update processes, aligning with the evolving needs of modern computing environments.