Fix office 365 install error 89% hang A lot of people have experienced this install issue that hangs at 89 percent, and someone discovered that the fix for this is nnce it hits 89%, just simply restart your PC then open any Word, Excel, or Powerpoint file that is already there in your desktop through Windows Office Trial then voila! You can now use your Microsoft Office…in other words, The only thing that is left uninstalled are the Shortcuts and Icons…as for creating new documents…..simple, just click, “New” in the starting screen of the Office app (Windows, Powerpoint, etc.)