I had computer motherboard replaced under warranty.  Had Office 2007.  After restoring OS 8.1 tried to download Office 2007.  Installation would hang and error message was simply stopped but sometimes would get close firewall message.  Opened 365 account with new website.  Tried to download desktop version from 365.  Same error message.  Have done the Mr. Fixit from microsoft, clean boot, stopped all services, closed virus, malware and firewalls, shut off defender etc etc.  Same error.  Tried both 32bit and 64 bit (I7 processor).  It has got to be something missing not colliding.  What in the world did I do to this thing?

Beside Fixit lots of suggestions have been sited here:

General troubleshooting for installing Office 2013 and Office 365

Hi Pacocoli,

What is the error message you have got ?

"Have done the Mr. Fixit from microsoft"
What is the fixit tool you have used ?Please try the tool as S.Sengupta posted and try the steps as the link suggested to have a check.

It is also recommended to look for help from Our Office forum for help .
https://social.technet.microsoft.com/Forums/office/en-US/home?category=officeitpro

Best regards