Hi Rick, thanks for your response
I have already downloaded the latest drivers via the Service Tag option through the Dell website. This didn't have any effect
I'm unable to connect to wireless from anywhere in the house, even sitting right next to the router. But the Ethernet connection works fine.
The Power settings were already set to "Maximum performance" but I did uncheck the "allow computer to turn off this device to save power" box. Still won't connect properly though.
My computer is still in warranty so should I just send it off for them to take a look?