Run the installer as an Administrator on your Windows Server instance.

When your server is in Shadow Mode, any modifications, malicious activities, or file deletions happen only in this virtual layer. Upon a system reboot, the virtual layer is discarded, and the server reverts exactly to the state it was in when Shadow Mode was activated.

To host web applications securely, IIS must be properly configured on the server prior to entering Shadow Mode. Installation of IIS on Windows Server 2022

Ensure the host has adequate RAM or write-cache disk space. Shadow Mode tracks all changes made during the uptime cycle; a high-traffic IIS server generating massive log files can quickly exhaust the cache pool, leading to system instability. Step-by-Step Installation and Initialization

Any authorized changes made to the central configuration automatically propagate to all web servers in the farm, eliminating configuration drift without requiring a system reboot. 2. Infrastructure as Code (IaC) and Automated Deployment

Running outdated desktop virtualization software on a production server hosting Internet Information Services (IIS) introduces significant stability and security risks. Furthermore, Microsoft did not release a version named "Windows Server 2021" (the closest releases being Windows Server 2019 and Windows Server 2022).

Run every website under a unique, low-privilege Application Pool Identity to contain breaches.