It sounds like your Office Home & Student (H&S) installation is in a view-only mode because it may not be activated properly. Since you mentioned that you discarded the card with the PIN, you will need to retrieve your product key to activate your Office applications. Here are the steps you can take:
- Check your Microsoft account: If you registered your Office product with a Microsoft account, you can log in to your account at account.microsoft.com to find your product key.
- Contact Microsoft Support: If you cannot find the product key through your account, you can contact Microsoft Support for assistance. They may be able to help you recover your key based on your purchase details.
- Reinstall Office: If activation issues persist, consider uninstalling and then reinstalling Office from your Microsoft account dashboard.
Make sure to follow the activation prompts after reinstalling to ensure that your Office applications are fully functional.