If you see Outlook error tag 58tm1 and it throws Error code 2147942403, you need to follow the solutions mentioned here to resolve it.

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.