My first idea was to create a custom SFX module without a cancel button for my unattended installations. After a time i ended here.
Now without a close button, once it is started you can't cancel the extraction.
Download and run the archive linked below. Silent switch is "/S" without quotes.
Preview

Download - 482 KB (494.170 bytes)
Changelog:
-Removed close button for all the extraction dialogs

