Encountered error 1603 while updating office 2016 Adult chat prague
If you have only one server in your Office Online Server farm, users won't be able to use Office Online while you are updating the server.
So consider updating the Office Online Server during either non-critical or non-business hours.
Like most Windows applications, Acrobat and Reader use Microsoft Windows Installer technology for installing updates.
Note that when you've completed updating your farm, you need to re-add any data model servers that you had configured for Excel Online.
To apply software updates or new versions to a single server Office Online Server farm, remove the Office Online Server from the farm, apply the software update or new version, and re-create the Office Online Server farm.
If that fails, I found out that Office 2013 uses task scheduler to install some of its components. Go to c:/windows/tasks and delete the contents of the folder, if you have a lot of tasks then take a backup first.
This error can occur if you have a corrupt scheduler database or the service is stopped. First start the Task Scheduler service in services At command enter.
I was able to go to %temp% and found the install log which has this error listed "Error: Failed to install product: C:\MSOCache\All Users\-C\Office64Error Code: 1603(0x643)"I have found out that it installs without any issue without the Anniversary Update.