How to fix Windows 11 Installation Assistant something went wrong error

The core idea is that the Windows 11 installation assistant needs full access to your system to do its job. If it doesn't have those permissions, it can choke and throw errors like the classic "Something went wrong" message. So, right-clicking the tool and selecting "Run as administrator" is a great first step—it's a simple way to give the Windows 11 installation assistant the permissions it deserves.

If you're still seeing the error after running as admin, don't panic. That specific "Something went wrong" error is usually a sign of a few other common culprits:

• Your Antivirus is Getting in the Way: Third-party antivirus software is notorious for blocking the Windows 11 installation assistant. Try temporarily disabling it and running the tool as admin again.
• Your System Files Are Messed Up: A quick System File Checker (sfc /scannow) and DISM scan can repair corrupted files that might be blocking the Windows 11 installation assistant.
• You're Low on Disk Space: The tool needs room to breathe. Make sure you have at least a good chunk of free space on your main drive.

So, yes—always run the Windows 11 installation assistant as an administrator. It's a solid first move. But if that doesn't magically fix everything, you'll probably need to work through the other steps like disabling your antivirus and running a system file scan. And if all else fails, grabbing the official Windows 11 ISO and doing an in-place upgrade is the most reliable free workaround you've got.