There is evidently something wrong with your system.
Try repairing the Office installation (via Windows Control Panel > Programs > Programs & Features > Microsoft Office (version) > Change > Repair).
Also try cleaning out the Temp folder (again), as per:
https://www.msofficeforums.com/word/...ory-error.html
Other possible causes are a rogue third-party addin (if the problem goes away when running Word in safe mode, that's a fair bet) and a corrupt template - which would impact all documents created from it.