Obtain the ReviOS 10 23.08 Upgrade ISO from official community mirrors like the Internet Archive .
Newer versions of ReviOS move toward a "Playbook" system, which applies modifications to a standard Windows installation instead of a custom ISO. Download the AME Wizard ReviOS Playbook Revision Download Page revios 10 23.08 upgrade
If you're doing a fresh install, use Rufus to create your bootable USB [1]. Obtain the ReviOS 10 23