How to Install a Windows 11 Update Offline using .MSU file

You can install a cumulative update offline using the MSU file. On Windows 11 24H2 and higher, to install a cumulative update offline, you need to download both the checkpoint update’s (KB5043080) MSU file and the latest cumulative update’s MSU file.

Install a Windows 11 Update Offline in 24H2 and higher

Here are the instructions for installing the latest cumulative update (LCU) in 24H2 and later. For example, to install the 2026-03 CU (KB5079473 – 26200.8037) for Windows 11 25H2, follow these steps:

1. Download the following MSU files.

   windows11.0-kb5043080-x64_953449672073f8fb99badb4cc6d5d7849b9c83e8.msu (checkpoint or baseline update)
   
   windows11.0-kb5079473-x64_651d0cdb7665e03bb80b4c198784b255081032d2.msu (cumulative update)

   (Note: The direct download links were obtained from the Microsoft Update Catalog.)

2. Move them to a folder at the root of the C drive, for example, C:\MSU. You need to create the folder manually. Ensure that the above folder contains no other MSU or CAB files.
3. Open Command Prompt (admin) and run this command:

   DISM /Online /Add-Package /PackagePath:c:\msu\windows11.0-kb5079473-x64_651d0cdb7665e03bb80b4c198784b255081032d2.msu
   

4. Restart Windows when prompted.

To see if the update was applied correctly, run winver.exe and note the OS build number. To see the list of OS builds, see Windows 11, version 25H2 update history.