This may be a silly question but is it possible to increase my laptops performace by changing the router.My current router is a Plusnet Hub One.I was browsing on Amazon and there are so many at all different prices.On example enclosed
You are best to select "Pass Through" models as they allow you to continue using that Socket.
Plug the base Home Plug in, below your Router and plug the Router's Mains Plug into it. Using the supplied Ethernet Cable plug one end into your Router and the other into the Home Plug.
Read the instructions about "Pairing". Plug the second Home Plug into a mains socket nearby to the Router and "Pair" the two.
Un plug the second Home Plug, take it upstairs, Plug it into the mains and turn on you Laptop. If you have bought one of the types that creates a WiFi Hotspot, which I recommend, you now have another WiFi Hotspot wherever you wish to place it in the house.
Which to chose, mine are now 3 years old and no longer made, but working well. Just remember, you need the type that creates a WiFi Hotspot and it is well worth paying extra for the 'Pass Through' Type
I don't think you are going to gain any noticiable speed difference as your downstairs and upstairs speeds are so close to being the same even if you bought the type of homeplug where you can connect the laptop by cable upstairs