Hi loutre114,
Thanks for contacting Apple Support Communities!
We understand that you've requested a copy of the notes associated with your Apple ID and you're unable to open them on your Windows computer after unzipping them, correct?
You should be able to open your notes via Notepad on your PC as outlined here: Get a copy of the data associated with your Apple ID account - Apple Support
"Frequently Asked Questions
How should I download and view my data?
Use a Mac or PC to download and view your data files. You should be able to view these files in the default applications on your Mac or PC, including TextEdit on Mac and Notepad on Windows."
We hope this helps you.
Cheers!