Is 8.1 refresh basically a new windows 8.0 installation plus migration of data? All programs have to be reinstalled but did they leave the old program files sitting there on C but not for use on the new load of the OS. The C is almost full after the refresh. What can I delete that are no longer in use? I really regret performing the refresh. Do they still have window restore? That was the original plan and now I'm basically starting from scratch.