Will try and paint the picture as well as I can.
I bought a second hand gaming PC last weekend, when picking up the pc the seller told me he had upgraded to windows 10 for the sale but hadnt tried everything and also there was no wirless card as he used LAN. I went straight to an IT shop on the way home and bought Powerline Network Adaptors. I installed all my games and everything was fine till my partner signed on her laptop the my ping went from 30-50 to 300+ which if you play games you will know that is unplayable. After doing some homework I tried upgrading my mobo drivers however couldnt find any for Win 10 (my mobo is not supported). Luckily the seller gave me his win 7 disk so I have now reverted back to win 7. Updated all drivers but the problem still persists.. It seems like because our laptop and tablet etc are newer technology that they are taking priority over me being LAN which I cant seem to understand. I called my ISP and they have check all my lines and have put it down to a software/hardware issue.
If anyone can suggest something I could try I would be greatful, I have posted on a few forums but no help yet.
Thanks in advance,