I had a feeling that it might be malware, although I've run Malware anti malware, Kaspersky's total security They've found PUP only, but the various checks I've done to see if the connection is working all the time have come back positive. Skype, voip works. I thought maybe the firewall was blocking the browsers but as far as I can see they're not.
I'm an amatuer at this, so I don't really know where I should look to check your suggestions. If you have the time and patience perhaps you could make it simpler for me go through your answers?