Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
I had a similar issue installing Office a few years back on Vista. Try copying the contents of the Microsoft Office 2007 disc to a folder on your hard disk.
Right click the setup file and click Run as Administrator and see if it installs then.
You disc might be dirty or corrupted, try downloading a copy of the edition you own and reattempt installation:
Also make sure that your Antivirus utility is temporarily disabled.