I am trying to install Microsoft Office 2016 Professional and Microsoft Visio 2016 Standard on a Windows 10 PC. The installation for both fails with the message "Couldn't install" and gives Error Code: 30125-1011 (403). This PC used to have Microsoft Office 2010 Professional installed on it, but it has been completely removed by doing a program uninstall. I also ran the Microsoft Office Uninstall tool (o15-strremove.diagcab) AND manually deleted all keys in the registry under Computer\HKEY_LOCAL_MACHIN
\Office. I tried
the suggestions on this page: https://support.office.com/en-us/article/error-code-30125-4-or-30125-1011-when-installing-office-7bfabec6-76be-4cde-880e-819a9c569612
, except bringing the PC to another location to attempt the install - which is not possible. I have turned off my third-party anti-virus & firewall protection (Kaspersky Internet Security). I've rebooted countless times after each attempted solution, but it still refuses to install. I am at a loss as to the cause or resolution. Any ideas?