I have just had a new hard drive installed and need to re-install office home and student 2007 but have misplaced disc but have the product key from original package. How can I reinstall using the product key

Hi Teresa,
You can download the installer from Microsoft. Please click on this link to go to the download site
https://www.microsoft.com/office/downloads/

Just select your product there and fill in the information needed for the download.

Hope this helps!
Regards,MJ