I lose the ability to click on anything except the popups, and the computer starts freaking out, the dock disappears, any page I had open starts trying to refresh, etc. Then a Keychain popup will alert me that a random app or process - CommCenter is usually among them - wants to use the login password (I've never interacted with Keychain and have no passwords stored on it), and if I click to cancel it, another immediately replaces it with a different app or process. Here's how it's gone in both instances: randomly, the window will tint slightly blue and I'll be unable to interact with anything for a few seconds. This has happened twice now, once in early November and once about half an hour ago. There have been no odd things happening before or in between the two events, and they happened at completely different times of day the only correlation is that I had Safari open both times, but the first time it happened when the only thing open was the default homepage, so I doubt it has anything to do with an untrustworthy or resource-intensive website. I got this computer in March of this year, and there haven't been any issues with it up to the first incident.

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