I believe the quotes are not needed.
See here:
http://www.csulb.edu/~murdock/rename.html

On Wed, Jan 29, 2014 at 12:07 PM, Jacob Smith <[log in to unmask]> wrote:
> I have written the following commands to a batch file:
> if exist "C:\windows\system32\drivers\file.sys"
> rename "C:\windows\system32\drivers\file.sys" "file.wassys"
>
> else
> rename "C:\windows\system32\drivers\file.wassys" "file.sys"
> I run it as administrator, and I've also typed it into the terminal in
> admin mode. Neither one does anything, no errors or prompts, nothing. I
> know that the file exists and will for a long time. I've written a few
> variants trying to change the working directory first, but they didn't work
> either. what am I missing? I've run the rename command alone and it worked
> fine.
>
> --
>  Blessings,
> Jacob Smith
>
>

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