internet freezing while using various shopping sites

[Alison1610]

Since switching to Sky Broadband using newly connected ultra fast cable my laptop (Mac Air Book) is no longer connected to hub/router via ethernet. Hub is in adjacent room. When trying to complete internet shopping the system often freezes for several minutes. I had to change a setting on my iphone to allow sites to download images ............is this same for laptop or do I need a booster for my wifi system. Laptop is less than 1 year old.  Thanks

[jamesn123]

@Alison1610 

What kind of signal strength does the laptop get in the room? Do other devices suffer the same freezing?