It works fine on my PC, Windows 11 Home 24H2 (26100.6899). Same version installer as yours. Make sure you have updated .NET Framework to 4.8.1, yours (4.8) is way out of date.
Hi, thanks for your reply. My .NET Framework is already up to date (version 4.8.1). Sorry about the typo earlier.
.NET Framework 4.8.1 or a later update is already installed on this computer.
I know this is obvious, but have you run Windows Update and made sure all the cumulative updates for .NET have installed successfully? The latest was KB5066131.
Thanks again ! and yes, my Windows is totally up to date, with this specific cumulative update:
2025-10 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 for x64 (KB5066131)
successfully installed on 16/10/2025.Since my first message, I’ve also tried launching Windows in Selective Startup mode (minimal services only) through msconfig, but the installer still crashes instantly, same behavior, same error.
So it’s clearly not being caused by any background service or software conflict. Still completely baffled at this point.
One thing I'm wondering about: it's important to run DISM before sfc, not the other way around. Your troubleshooting list makes me wonder if you did that in the wrong order?