Forgot to answer you on rebooting - absolutely yes. This problem has been going on now for 5 days or so. The weird thing is, if I click on 'File' on the top left of the computer, and go to 'private window', it will open a new window and I can put in the same address that Safari would not open to one minute before, and now it will open. I just can't get it to open to the address unless I use the 'private window' first'. As far as wi-fi, I still can't find out how to 'reconfigure' it into the list of choices.I got this in September or Oct. 2009.