Thank you very much, Roger. I didn't know about this command before. However, being as illiterate as I am with Windows(I had to make a reluctant switch from an Apple), I can't find out why it gives me this:
I tried specifying the full filepath to Data-Serialzer-0.20.tar.gz, and tried just Data-Serializer-0.20 and I get the same thing.
Please forgive my stupidity.