Any attempts to reinstall on the same computer or transfer the product will be left to Microsoft's discretion. This is a single use OEM/OEI license, and is intended to live and die on the initial computer on which it is installed. Unfortunately no, Office 2019 will only work on Windows 10 or Windows Server 2019. Be sure to check your spam folder for the email as they tend to get filtered there.
Upon purchase, you will receive an email with your license activation key, as well as instructions to download the software. However, It is intended to live and die on the initial computer on which it is installed. This is a one time fee for a single perpetual license, you will not have to pay any subscription fees. Is this a one time charge? or a subscription that I have to renew?