On one of my newer office computers, I have Windows 10 and Microsoft Office 2019. In Word, but not in Excel, we started getting the following message: Cannot create PLMSWord.PLWordError = -21472216 class not registered I uninstalled Office, rebooted the machine, and reinstalled Office by download from Microsoft using the product key. The same problem persists. Office has been working fine on this computer for a month. Any ideas?