Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Try re-registering the Windows Installer:
How to resolve Common "*Windows Installer* " Problems
Make sure you temporary disable your Antivirus utility, it might interfering with setup.
Point to where the installation files are stored.
Click Organize > Select All
Click Organize > Copy
Create a folder on your desktop, name it Office
Open the folder, click Organize > Paste.
Right click the Setup.exe file
Click Run as Administrator.
See if it installs then.
Teching It Easy: With Windows |ActiveWin |Notebooks | Microsoft MVP