If your network drops under heavy download loads, the older power-management features may be conflicting with Windows 10.
While the search phrase "realtek rtl8139 driver 810x family pci-e gigabit windows 10" targets multiple generations of hardware, resolving your internet connectivity issue comes down to identifying your exact Hardware ID. Use Windows Update or the official Realtek catalog to secure the correct 10/100M or 1000M driver, and enjoy a stable, high-speed connection on Windows 10. realtek rtl8139 driver 810x family pci-e gigabit windows 10
