Hi, welcome and thank you for your question. My name is ***** ***** I am glad to assist you today.
I am very sorry about your issues. If you still have your product key, and since it is Office 2010, you can download it from Microsoft and install it to your computer.
Please click on this link:
On that page, please scroll down to the part that says "Enter Product Key". There you need to correctly enter your product key, then click Verify.
When it is verified as Valid, you will be given a download link. Just click on the download button/link to download the installer and install to your computer by double clicking on the downloaded file.
I hope that helped.
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