The Pegatron N14939 is a reliable Wi-Fi module board. The "Driver 91" error is a software mismatch issue. The fix is determining whether you have the Intel or Realtek variant of the card and manually installing the manufacturer-specific driver rather than relying on a generic Windows update.
This method bypasses Windows Update and forces the driver to install, often clearing Error 91. pegatron n14939 driver 91
Once, there was an old computer named "The Titan" that sat in a dusty corner of a garage. Its owner, Leo, had nearly given up on it until he discovered its heart: a Pegatron N14939 The Pegatron N14939 is a reliable Wi-Fi module board