"I have: C:\Users\proton>_ while the manuals say C:\windows\desktop\. Is this going to make a big difference? How do you change it into the later form?"

If you don't know what this difference signifies, and how it might affect things, then I'd suggest you have some other learning to do before you learn Perl.

In particular, you should be able to answer these questions, otherwise you'll probably find even running Perl scripts at the command line difficult:

• What's the difference between an absolute file path, and a relative file path?
• What does the concept of a "current working directory" mean? How can I find out the current working directory from the command line? And how can I change it?
• How does the current working directory affect the interpretation of relative file paths?