Hi Angela,
Irrespective of the OS that is running on your server, if you have forms in your muse design then the Muse generated code will include php files, so you will need to make sure that the server that you are uploading the content on has php installed to process the form data.
In addition you can run the form check script to see if your server has everything needed to be able to run a Muse site. Check this doc for more information on how to run the form check script, Troubleshooting Muse Form Widgets Used on Third-Party Servers, section - "How can I check if my hosting provider has the required technology enabled for my website?".
- Abhishek Maurya