I have been having this for quite some time. Been on most of the forums and tried lots of suggestions. Nothing has helped. As far as I can tell NOBODY has a solution. Several times after making a change it stoped for a couple of days but always came back. Last night it was going down every fifteen minutes. I have reformated drives, replaced drives, replaced memory, swaped components with anoter computer, put in a new video card, updated BIOS, made sure all driver are up to date, reseated all components. I am now going to buy a new computer with the restriction that if is has a Kernel-Power error the supplied will take it back and give me a full refund. I belive that it is hardware related to Win7, something with a check that win7 is doing and not liking the results, like maybe a voltage out of the range Win7 expects.