– Version 15 was built before UEFI became standard. It boots only in Legacy BIOS mode. Most computers from 2017 onward default to UEFI. You must enable CSM/Legacy boot in BIOS to use it.
Here’s an interesting, honest, and detailed review of — written for both nostalgic veterans and curious newcomers. hiren boot cd 15
When the Hiren’s boot menu appears, you will see several options: – Version 15 was built before UEFI became standard