If the driver appears installed but Error 91 persists, a registry key may be stuck:
Don't waste hours looking for a file specifically named "N14939.exe." Just grab the standard Realtek PCIe GBE Family Controller driver, and you’ll be back online in minutes. pegatron n14939 driver 91
If you can share the exact (e.g., PCI\VEN_10EC&DEV_8168&SUBSYS_... ) from Device Manager, I can give you the direct driver download link. If the driver appears installed but Error 91
Look up the specific motherboard model you found in step 1 on trusted driver databases like the DriverScape Pegatron Index or DriverHub Pegatron Catalog . 3. Use Windows Update PCI\VEN_10EC&DEV_8168&SUBSYS_... ) from Device Manager
Features dual slots for DDR4 RAM , supporting up to 64GB of total capacity.
Always restart your computer after the installation finishes to apply changes. 2. Manual Installation