The problem started this weekend, spinning pinwheel of death every minute or so. The computer boots fine, I click my icon, freeze, input password, freeze, boots up slowly, no login items, freezing constantly. I turned off wi-fi finally, no internet connection, computer running smoothly. I was able to open itunes, back up phones, listen to music, open apps, even time machine sync. I open Safari with no connection opens and closes fine until i turn on Wi-Fi, Safar can't connect, freezes, app store can't connect, freezing, iTunes store as well. Already tried repairing disk, no problems there. Thoughts?