Hi, although my internet connection is registering as fine and working on other computers in the house, I am having problems connecting to the net on my iMac. I can't send emails (but can receive them) and for example I can log on to Facebook but then can't access my Inbox or reply to comments, or I can log in to my bank account but can't access transactions. After a long wait while it's loading there is an error message saying the connection has been dropped. I have tried re-launching Safari, and deleting then adding the email address again, which works for about an hour then they start playing up again. Any suggestions or help very much appreciated thanks.