Hello...
I have started facing the exact same problem. The "xcopy..." by PrarieNerd did not solve my problem.
I am now running "sfc /scannow" to see what happens.
Could you give me a hind on which software caused it. I am running a backup software and from what I read, this might have caused it. Please don't mention the name because of legal issue, but any hint would help.
I hate it, but I may have to re-install Windows 8 from scratch.
Thanks... PK