While there is no official "15.4" release, the community often uses that term to refer to fixed or "Restored" editions of the final official DOS-based release, Hiren's BootCD 15.2
You have the hiren boot cd 154 fixed link and you’ve downloaded the ISO. Now, how do you use it on a modern PC (most of which lack optical drives)? hiren boot cd 154 fixed link
Yes. Use or UltraISO to open the ISO, navigate to \HBCD\Programs , and drag in your portable .exe files. Save the ISO and rewrite to USB. While there is no official "15
Even then, verify the ISO with:
To avoid malware or broken files, stick to these established sources: Official Legacy Versions (v15.2 and older) : Available at hirensbootcd.org/old-versions Internet Archive Modern PE Version navigate to \HBCD\Programs