iCloud for Windows and iCloud for Outlook Windows Installation Error

I'm having the exact same problem installing the iCloud app from the MS app store into my wife's laptop running Win 10 v20H2.  I tried everything with no luck.

As a work-around, I installed the Apple version (7.21.0.23) which is only recommend for Windows 8 or earlier.  It is working, but I'm worried Apple will not continue to support it on Win 10, so I'd rather install the recommended MS app store version ASAP. 

Ironically, on my laptop, very similar to hers, also running Win 10 v20H2, I had no problem installing the MS app store version (12.2.10.0).

Even though her laptop has the old version, all of our contacts and calendars are syncing between our laptops, iPhones and iPads.

I don't get an error code. After I check the box next to "Mail, Contacts, Calendars, and Tasks" and hit "Apply", I get this message:

iCloud for Windows did not install properly. To repair it, you need to go to Apps and features, select iCloud Outlook from the app list and click Modify. When prompted, click Repair

When I go there and click Repair, it runs for a while, indicates it is moving files, then goes back to the main screen with the box unchecked. Trying again yields the same result. It's as if the Repair failed.

When I open iCloud as an Administrator, it just keeps spinning after I hit Apply, as if hung in Repairing.

I’m afraid Apple support is rarely helpful. :-(

I have a similar issue but the error code I receive is: Ox800706ba