Your host computer needs the specialized BlackBerry link drivers to detect the device in its bootloader state.
If a low-level memory allocation error or a corrupted system file renders the Z3 unresponsive, the autoloader forces the device into a flashing mode to rewrite the core partitions. blackberry z3 stj1001 autoloader developer
Right-click the downloaded BlackBerry_Z3_STJ100-1_10.x.x.xxx.exe file. Select . Your host computer needs the specialized BlackBerry link