Change Win 8 Username

I set up a new user for somebody to work on my computer, and I ended up having to reformat my harddrive (Win 8/x64). When all my stuff was restored through carbonite, I noticed it is all on the user I created for this person. How can I either change the username or copy the contents to my main profile?


Open up the Computer Management console (compmgmt.msc) and as below:

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