When Your Installation of Office 2016 or 2013 Hangs at 90%
If you’re trying installing Office 365, Office 2016, or Office 2013 and the installation becomes unresponsive (hangs or freezes) at approximately 90%, the problem may be the Windows Installer is busy.
If Windows Update is using Windows Installer, the Office installation has to wait until the update process has finished with the Windows Installer. If Windows Installer is hanging, Office won’t get past the 90% mark. How you proceed depends on whether you’ve cancelled the Office install. Try installing Office again; if Office is still trying to install, end the Windows Update. Try the steps below. If none of these steps work, see Office is taking long to install for other solutions.
If you've already cancelled Office install,
try installing Office again
If you've cancelled the Office install, you'll need to re-try the install. Before you do, check if Windows Update has completed.
Press ctrl+alt+delete on the keyboard, and select Task Manager (or Start Task Manager on Windows 7).
Select the Processes tab, and look for the Windows Update Standalone Installer (wusa.exe). If it’s not displayed in the list, the update has completed.
If you haven't quit the installation, use Task Manager to end the Windows Update process.
If Office is still installing, end the Windows Update
You can wait for Windows Update to complete, but there could further delays. It’s more reliable to end the Windows Update process in Task Manager so Windows Installer can be used for the Office installation. Do the following to end the Windows Update process.
Note: Disabling Windows Update could affect the installation of a valid Windows update. If you restart your computer after the Office installation, the Windows Update process should continue.
Leave the Office installation running . . . waiting at 90%.
Press ctrl+alt+delete on the keyboard (hold down all keys simultaneously), and select Task Manager (or Start Task Manager on Windows 7).
On the Processes tab, select Windows Update Standalone Installer (wusa.exe).
Select End task (or End Process on Windows 7). The Office installation should now resume and complete.
After the installation has completed, Restart your computer to let the Windows Update process restart. You may need to manually restart Windows Update.