|First, check for newer drivers for your NIC (Network Interface) on the manufacturer's website. If you find some, apply them and see if that doesn't fix the issue.|
If it doesn't, I'd recommend replacing the NIC. If your present NIC is built onto the motherboard you would have to disable it in the BIOS prior to installing a new NIC. You would need to have an unused expansion slot in your PC to install a NIC into as well.
If you don't have a free slot, you'd have to use a USB NIC.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.