To resolve the 'Word cannot open the existing file (Normal.dotm)' error, reset the Normal.dotm file, use Open and Repair, and disable add-ins.

If you run into a "Content File Locked" error while using Steam, don't despair, it should be fixable. Here are some potential solutions to try out.

If Windows cannot access the specified device, path or file, when trying to open Printer properties in Windows 11/10, see this post.