C:\p517\perl>perl -v

This is perl 5, version 17, subversion 5 (v5.17.5 (v5.17.4-47-g432d456)) built for MSWin32-x86-multi-thread

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C:\Documents and Settings\Administrator\Desktop>perl -v

This is perl 5, version 14, subversion 2 (v5.14.2) built for MSWin32-x64-multi-thread

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C:\p517\perl>perl -MConfig -e  "print $Config{archname}"
MSWin32-x86-multi-thread
C:\p517\perl>