:HDAT2 HDAT2.EXE GOTO END
You do not have a "full" ISO. You need a pre-activated version where the license key is already embedded into HDDREG.EXE or where a DEMO.KEY file exists in the ISO root. Search for "HDD Regenerator 1.71 full activated ISO." HDD Regenerator 1.71 vs. Modern Alternatives Is it still relevant in 2025? Here's a comparison: hdd regenerator 171 full better bootable iso
"Demo version – only 1 sector regenerated." :HDAT2 HDAT2