Hi,
Welcome to Microsoft Community and thank you for posting your query.
We appreciate your effort towards resolve the issue and understand that it dint worked for you.
A quick question before we proceed.
Let’s follow below steps and verify the results.
Let’s deactivate Office first, by login to the My Account page on Office.com with the Microsoft account you used to register or purchase.
http://office.microsoft.com/myaccount
After deactivating Office from My Account page, let’s manually uninstall the Office suite, restart the PC.
Please refer to the below link to Uninstall office suite manually.
https://support.office.com/en-us/article/Manually-uninstall-Office-2013-or-Office-365-1d1110d5-75a4-4154-969e-4260ff29b232?ui=en-US&rs=en-US&ad=US
Note: Steps in the above article applies to Office 2016 also.
Disclaimer: Ensure to back up complete registry following steps mentioned in the article below as manual uninstallation involves in deleting the registry entries.
Refer to the below link on how to back up registry.
http://support.microsoft.com/kb/322756
Once the manual uninstallation is completed, you may create new Windows user account.
You may refer to the below article for suggestions to create new user account.
http://windows.microsoft.com/en-in/windows-10/create-a-local-user-account-in-windows-10
You may also temporarily disable the third party security program. (If you have installed any)
If you have installed any third party security program, then I request you to contact its technical support to temporarily disable the program and then check the issue.
Disclaimer: Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software.
If you have to temporarily disable it to install other software, you should re-enable it as soon as you're done. If you're connected to the Internet or a network while your antivirus software is disabled, your computer is vulnerable to attacks.
Hope it helps. Try the suggestions and let us know the result at your earliest convenience.
Thank you.