I'm using the current release of Strawberry Perl and Windows Server 2008.
For some reason Perl doesn't seem to find files in the current working directory:
F:\temp\hackr\e>perl -ne 'print if (rand() < .01)' train.csv
The system cannot find the file specified.
On the Windows command line, use double quotes around command line arguments that need quoting.
perl -ne "print if (rand() < .01)" train.csv