Sounds very simple, however, my PC isn't connecting to my network via Ethernet connection directly from the modem. Re-started PC and modem, changed the settings in control panel>network & Internet>network sharing centre>change adapter settings by amenending Internet protocol 4 properties with manual IP addresses and after another restart, no network still cannot be found and Windows cannot find a solution or identify the problem. Last solution I thought of was creating a new network connection, but again no luck. Modem and Ethernet cable are new and have inspected for damage just encase. I'm using Windows 7 and this was fine until yesterday.
To get the best speed and stop the home network dropping out, I advise you buy a longer ethernet cable (Cat5e Patch cable) and not use the Solwise Homeplugs (as you do not have enough electric wall sockets).
Cables are not expensive, under a tenner. They sell them at lots of shops, including Argos.