To purge the extra files:
This really solve the problem you have. The correct syntax is:
robocopy c:\purge d:\users /purge
where "d:\users" is the infinite loop path
Also make sure to create a blank folder named "purge" in c:\ as mentioned above
Run the robocopy command a few times until it delete all the copied folders. It works for me.
robocopy y:\purge y:\users /purge
in the administrator command window
and it cranked for 20 seconds, deleting 401 Extras Folders, and 2595 Extras Files.
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