Windows Vista, 7, Server 2008, 2008 R2 and newer Windows operating systems do not allow a user that is NOT the local Administrator access to the UNC location of c$ as it is considered an administrative share. This is a security within UAC (That I recommend leaving intact, I like security). Wiki makes mention of re enabling the access here. There is mention of this in a answer page on Microsoft here. A workaround is to create a folder and share that, then from the second machine UNC to \\hostname\sharename replacing ‘hostname’ with the hostname or IP and replacing ‘sharename’ with the name of the share created. I failed to realize this right away and was trying to connect to \\hostname\c$\sharename unsuccessfully.
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