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.

There are instances where users reports getting an error “File is open in COM surrogate” when trying to access or rename and edit a file on Windows Properties ...

Fix File System Errors 2018375670, 1073741819, 2147219200, 2147219196, 2147219194, 805305975, 2147163893, 2144927439, 107354193, 1073741792, etc.

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.