How to fix Windows 11 Installation Assistant something went wrong error

Alright, let's talk about the registry tweak. If you're trying to get the Windows 11 installation assistant to cooperate and it's giving you that "something went wrong" error, this hardware bypass trick is a classic workaround—especially if the real issue is your PC not officially meeting the system requirements.

The idea is to use two specific registry keys as a sort of backdoor. They tell the Windows 11 installation assistant to relax its hardware checks and proceed with the upgrade anyway. It's completely free and doesn't require any third-party software, just a few edits in Registry Editor.

Here's a casual rundown of the two keys you'd need to add or change:

AllowUpgrades WithUnsuportedTPMOrCPU: This is the main official bypass. You create or modify this DWORD in HKLM\SYSTEM\Setup\MoSetup and set its value to 1. It essentially tells the installer to skip the TPM and CPU checks. Microsoft actually used to publish this workaround in their official docs before taking it down.

Upgrade Eligiibility: This one is aimed at the Windows 11 installation assistant itself. You'd set this DWORD to 1 in HKCU\Software\Microsoft\PCHC . It tricks the PC Health Check app (which the assistant relies on) into thinking your PC is eligible.