No message, it just crashes. I first thought, that the problem only pops up when I make review comments in my Mac version (she's on Windows). But lately, we had two cases when Windows users sent her a docx which crashed her Word. I can open the same documents without a problem. I then save them as doc instead of docx and then she can open them with all the reviews OK.

The issue seems to be specific to your boss's computer then. Has she tried the general troubleshooting techniques discussed at http://word.mvps.org/FAQs/AppErrors/...artingWord.htm?

__________________
Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional

Most likely not, thanks. I only see her on Tuesday, so it will be a while till I get back to you. Thanks for your help.