I know there have been weird issues during the whole PrintNightmare débâcle, with one of them being the inability to print unless one has Administrator privilege, so I thought this might be worth throwing in the pot.
I encountered a similar issue with one of our users and I ended up having to remove Office completely, reboot, and then reinstall to get it working again. I did use the MS Uninstall Tool, which you can download from this
page, and that does a lot more than the simple uninstaller from Control Panel.
Also, for the sake of completeness and in order to understand better what we are dealing with here, please download and run the
TSG System Information Utility on the affected PC, and then post the results back to this thread.