How can I upgrade Windows 10 to Windows 11 25H2 without data loss?

There are several ways to upgrade Windows 10 to Windows 11 25H2, one of which I recommend is more controllable and good for when the installation assistant fails to upgrade properly.

1. Open the official Windows 11 download page and locate the Create Windows 11 installation media section.
2. Download the Media Creation Tool and run it.
3. Follow the steps prompted by the tool to step through the creation of a bootable USB drive.
4. With Windows 10 running normally, insert the created bootable USB drive into your computer.
5. Open File Explorer, locate and enter the directory where the USB drive is located, and double click to run the setup.exe file.
6. When prompted to choose how to proceed, select Download and Install Update.
7. Read and accept the terms of the license, go to the Select what to keep screen, and check Keep personal files and applications.
8. Follow the on-screen prompts to complete the remaining operations and wait for the upgrade process to finish.

Backing up your personal files before upgrading is a crucial step to minimize data loss due to unexpected circumstances. According to the method I gave you, when upgrading to Windows 11 25H2, you can not only retain the original files and applications, but also experience the new version's functions. The whole process is safe and efficient, allowing you to easily start using and experiencing the new version.