I have a few non administrative Windows accounts on my PC which I will refer to as Pu, Ja, and Ma.
From all three accounts, “Access Denied” was the message when I double-clicked on *.docx and *. doc files from Windows Explorer. The same message appeared when I tried to launch Writer from the Windows 10 Start Menu. When I open Calc from Ja and in the menu choose File Open I can open these documents.
From Windows Explorer in all three accounts I can open the *.xls and *.xlsx files by double clicking on them from Windows Explorer.
All of the these files were created with Libre 184.108.40.206. On 12/30/2019 I upgraded to 220.127.116.11 (x64).