jlinkx64.sys is a core 64-bit kernel-mode driver developed by SEGGER Microcontroller
Given the naming pattern, it appears to be either: jlinkx64sys
debug probes, which are industry-standard tools used by engineers to program and debug embedded systems. Microsoft Learn Functional Overview jlinkx64
Alternatives and ecosystem
Driver Errors: If Windows says this file is missing or has a signature error (Code 52), reinstalling the latest Software Pack usually fixes the registry path. jlinkx64sys