Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Garret,
Welcome to Microsoft Community and thank you for posting your query.
Please provide more information before we proceed.
-Which browser are you using?
-Did you have any previous version of Office installed?
If you are using Internet Explorer then open in private mode and try to download.
Close all open windows including all browser windows. To launch IE in the InPrivate browsing mode try the section Start an InPrivate browser session from the following article.
http://support.microsoft.com/kb/2811180
You may also refer the steps provided in the link and check if you are able to fix the issue with the installation.
Hope the suggestion provided is helpful. Reply if you need further assistance.
Thank you.