The mso9.dll apparently is particularly prone to getting corrupted, and it usually causes troubles in PowerPoint, Word and Outlook rather than in Excel. There is a way to repair such corrupted files ...
How-To Geek on MSN
6 Excel problems Microsoft should finally fix in 2026
Excel still trips over dates, ghost links, and undo history. These six fixes would save hours for everyday users.
If the ERROR.TYPE function in Excel is not working on your Windows 11/10 PC, this post will help you fix the issue. The ERROR.TYPE() function is one of the most ...
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