Sounds like it has defaulted to installing itself as a brand new installation and just formatted the hard disk from scratch to set itself up. Some of the specific drivers might be missing as the computers are different, but basically it sounds like a clean system install. Logical if the software was originally destined for setting up a brand new computer system and it hadn't been run before.
You will most likely have to restore your personal files from a backup and download and tweek some of the device drivers from the manufacturer of the computer you have installed the operating system on.
Looks like things will work out okay.