I am on Windows 11 25H2. I want to reinstall using Windows iso over this installation by keeping files and everything, but it does not let me keep them. It only shows the "Keep Nothing" option. I have tried reinstalling using Windows Update, but it shows error 0xc1900101. I don't want to do a clean install because then I would need to log in to everything again and configure a lot of software again. How do I troubleshoot this? I have tried fixing upgradematrix, ran sfc scan + dism repair.
You might be trying to install a older version of v25H2 that's lower than the build your currently running. To check your version press windows key + R, then type in winver and press enter. After this a dialog will appear and tell you what version number installed on your system.
@78372 What is the exact installed build and language, what is the exact used ISO and language? I don't know if setup knows the deltabuild.