Preview is not opening anything. Merely double click an image, or clicking Preview to open it makes my computer lag severely for up to 2 minutes. Is there any way I can uninstall and re-download it, or fix this problem? Not sure if this is related, but opening my Applications folder has the same effect, but not for nearly as long or severe, maybe just about 20 seconds. It seems opening ANY folder with "Preview" in it results in freezing up. It's starting to get really annoying, but I've downloaded a replacement image viewer until the problem is fixed.