If you just need the functionality (creating virtual drives or ISO images) on a modern version of Windows (10 or 11), you might not actually need Virtual CD anymore. Windows now has built-in support for mounting files directly.
An open-source, lightweight tool that works perfectly on Windows 10/11. Daemon Tools Lite: A long-standing alternative with a free tier. VirtualCloneDrive: A very simple, free "no-frills" mounter. A Quick Warning
If you previously purchased a license and lost your code, your best bet is to contact the original vendor. Even though the product is legacy, they often maintain a database of previous purchases. virtualcd-online.com
