After backing up, reformatting, and carefully restoring files, my Mini is flying... until<br>I was working in Photoshop CS yesterday and in the middle of my tinkering an ugly black bar breaks across the screen with white text on it saying something about unknown CPU error and a number of other things which I don't remember. This same message scrolls up several times before it stops and my machine is locked up. <br><br>Naturally, I had to reboot and it's run fine since, but I'm now facing something, clearly more, than just some junk files on my hardrive.<br><br>Could this be the nail in the coffin pointing to a bad RAM?<br><br>