How to delete a user's folder in Windows 8.1?

I have a laptop which is being given to a different employee. I added a new Administrator account and deleted the old one.

I deleted the User from the Windows 8.1 user utility thingy.

So the user is gone, can't login, that's good.

Problem is, in Explorer, he's still there. Let's call the guy Bob. So when I navigate to C:\Users I still see the \Bob directory. I don't want to see Bob any more.

Can someone please tell me how to remove C:\Users\Bob? When I try, it goes on forever (says it's deleting some 12 gig of files - which don't exist in that directory) then hangs on a couple of system files. Bob's gone and not coming back, I'd like his user directory to do the same.