Have a dell e6410 that runs mcafee av. Every once in a while the system will randomly lock up for about a second or two and then snap back to normal. When it's frozen nothing works, everything just pauses. It seems like if I hover over items in the menu so the preview pops up and then I move over to a different one this can cause it sometimes. But sometimes it will happen and I'm not even in the previews and it will do it. Anyone ever experienced something like this before or have any ideas?