Would switching to dual band give me better signals downstairs from an upstairs hub if I upgrade? My line comes in on the first floor for historic reasons but we often use broadband downstairs on laptops and get the dreaded buffering on iPlayer etc. All my computers have the required card, by the way. Or shall I try the power socket system? Ethernet gives 65 Mb/s+ so the line is good.
Dell Studio1558 with Win7 Home Premium
IE10 and Live Mail
BT Infinity via HH3
VM 120Mb/s (using Ethernet)