My Nana has an iMac. For months now, it wont connect to the internet when it's turned on. The only way it will connect is to unplug the wireless (router) and plug it back in. I am ALMOST sure it's not the wireless because her iPad and my iPhone never has a problem connecting to the internet. Just the iMac. I believe it's an early 2010 and it's had all it's updates that were available. Can anyone help?