If you tell me whether you need the old 16.2 for a specific legacy machine or want help with the modern PE version, I can give more precise instructions.
Hiren's BootCD 16.2 is a legacy 32-bit edition (released in 2015) based on Windows XP/PE. There is no official 64-bit version of version 16.2 — it was built as a 32-bit recovery environment. Many tools inside it are 16- or 32-bit only. hiren boot cd 16.2 iso download 64 bit