
There’s a Microsoft Knowledge Base article on this issue and the solution is to give EVERYONE full control of the Opa11.dat file. Before doing the above, you should at least use the official Microsoft Office Diagnostics tool to check if it has detected any other known problems. The worst part is uninstalling Microsoft Office and re-installing wouldn’t help to fix this problem. You’ll also be getting the same error message if you try to run any of the other office components such as Excel, Publisher, Access, Outlook etc. After clicking the OK button, Microsoft Word closes. Please run setup to install the application.” when you try to run it. Recently Microsoft came up with some updates that caused many users to get an error message saying “Microsoft Office Word has not been installed for the current user.
