If you get an error message saying “Unable to run a file from the temporary folder. Aborting installation. Error 4551: An application control policy has blocked this file” with Windows 11:
This error is caused by Smart App Control, a Windows 11 security feature that sometimes blocks the installation of new software.
To resolve the issue, you must:
- Go to Settings → Privacy and Security → Windows Security → App and browser control.
- Click Smart App Control and disable it.
- Restart the installation.
You can reactivate Smart App Control after installation.