I have recently bought a pair of powerline adapters to increase my WiFi range. TP-LINK model TL-WPA 4220 KIT. Having failed to get them working properly the seller suggested updating the firmware nd gave me this link click here am using W10. Unsure what to do with the firmware or whether I have got something else wrong, I have read and thought I understood the instructions. They may be faulty but I don't want to return them if it is me that is the problem. Any general advice please.