Sometimes a simple reboot can fix temporary software problems.
Do you have the latest version of MS Word 2019 installed? You can check for updates by opening the File menu, selecting Details (or Help in older versions), and clicking the Update button. Try disabling add-ons: There may be some add-on or plugin that is interfering with Word. Try disabling all add-ons temporarily and see if you can continue working without any slowdowns.
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