OK, you've done pretty much everything I was ready to start (thanks for the list, that speeds things up).
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Your problem should normally be fixed by doing a repair or install. Setting up the Start menu tiles are part of both of those processes. But apparently, something in your current setup is blocking the Word tile/shortcut.
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At this point, it looks like you have to break out the "big guns" and do a "full" uninstall using Method 2 in the following tip. This will nuke all of your customizations, so if you have customized Word, make a backup copy of your NORMAL.DOTM. If you have
customized Excel, backup personal.xlsb
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Uninstall Office 2016 / 365 – 2007
https://support.office.com/en-us/article/uninstall-office-from-a-pc-9dd49b83-264a-477a-8fcc-2fdf5dbf61d8?ui=en-US&rs=en-US&ad=US
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Method 1: Uninstall from Control Panel (or Settings dialog)
Method 2: Completely uninstall Office with the uninstall support tool (SetupProd_OffScrub.exe)
Method 3: Remove manually (Registry Hack)
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The Method 1, “Normal uninstall”, is designed with the assumption that you will be re-installing Office. It does NOT delete everything. It leaves configuration files like NORMAL.DOTM and other templates etc. It also
leaves configuration Registry entries. Normally these “carry-overs” are safe. But if method 1 didn’t fix your problem, they may be the cause.
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Method 2 (and 3) are intended to completely wipe Office from your computer
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Note:Method 1 includes links to Office version specific re-install instructions
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Office File Account - 365 activated Pro Plus 2016 not activated.jpg
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Method 2
So if Method 1 doesn’t fix your problem, try Method 2. Method 2 does a more thorough job that the “normal” uninstall (aka Method 1). It deletes “everything” associated with Office
except your personal (document, spreadsheet etc) files created using Office
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* Boot the computer.
* After the restart go to
http://office.com/myaccount to re-install Office 365.
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http://www.thewindowsclub.com/uninstall-microsoft-office-2013-365 - This page is
a “how-to” on using 27390501 and has screen captures of the whole uninstall process
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NOTE:
BEFORE you start the uninstall,
If you have an Office 365 bundle or Office 2016 / 2019, make sure you can access the MyAccount page so you can reinstall.
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