PS C:\Users\me> Get-Host | Select-Object Version

Version
-------
5.1.19041.1682


PS C:\Users\me> C:\EX_D\ulisseDUE\perl5.24.64bit\perl\bin\perl.exe -e "print $^O;"
PS C:\Users\me>                                                                     # no output as you noticed

PS C:\Users\me> C:\EX_D\ulisseDUE\perl5.24.64bit\perl\bin\perl.exe -e 'print $^O;'
MSWin32                                                                             # ok with single quotes.. meh