I had random issues with a couple versions of Perl and ended up using 5.16.3 x64. The downloaded file was, ActivePerl-5.16.3.1603-MSWin32-x64-296746.msi, if you have no objection to trying another version of Perl then you might want to try that.
If you are targeting x64 why is your Perl looking in C:/Perl and not C:/Perl64? Did you change the install path yourself because 64bit install will install to Perl64 if left alone.
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