What is the version of the following sentence with correct punctuation?

For instance while attempting to open a PPT PPTX PPS file you may had come across error messages like Unable to read the file Unknown Error occurred Invalid file path Error 123 sorry file cannot be accessed etc
For instance, while attempting to open a PPT / PPTX / PPS file you may had come across error messages like "Unable to read the file", "Unknown Error occurred", "Invalid file path", "Error 123 : sorry file cannot be accessed" etc.