A family of Microsoft word processing software products for creating web, email, and print documents.
Hello Tom,
Sorry for the inconvenience caused at your end.
From the icon you shared, I tried to search to understand the meaning of the icon but I couldn't find any reference or related article explaining the icon. Since you mentioned the problem happened after upgrading to Windows 11 Pro, I would like to know whether this problem happens to only Word documents or all files? In addition, as you have already contacted the support, can you please ticket number and sample Word document via Private Message? Here is the link to access private message.
Best Regards,
Chitrahaas