My old x220 was rock solid. I expected that from the carbon. But almost every time I turn it on there a problem. It is still under warranty if you can figure out the hoops you have to jump through. They don't make it easy. The last time I turned it on, it wanted my PIN but it rejected it. I could only log in through remote desktop from another PC. After that, the PIN magically worked. How sweet and kind to allow me to log in to my own PC. If I needed it on the road I would not have remote desktop as an option. I can't trust it now. It is worthless junk to me now. I am never going know if it is going to give me the privilege of logging in, or require my PIN that it rejects..