is a hardware tool used for flashing, unlocking, and repairing certain older Nokia, Samsung, and other feature phones. The "v15 fixed" driver you mentioned is typically a community-released or patched driver to make legacy JAF hardware work on Windows 10 64-bit , since official drivers were never updated beyond Windows 7 or XP.
Given that official development of JAF ended years ago, no digitally signed Microsoft-approved driver exists. The v1.5 fixed driver is and generally safe if downloaded from trusted GSM repair forums.
If the box is not recognized even with drivers installed, it may require a firmware re-flash of its own internal EEPROM using specialized tutorials.
JAF Tool Flashing | PDF | Booting | Microsoft Windows - Scribd
Check "Run this program in compatibility mode for" and select Windows XP (Service Pack 3) Check "Run this program as an administrator". Handling Errors: