Hello,
My name is Charles Kenyon and I am an Independent Advisor in this forum . This forum is a user-to-user support forum. I am a fellow user with decades of experience using Microsoft Word. I have written extensively on using Word and have help articles on the Microsoft site.
Is this a problem with one mail merge or all or something in between?
You may want to review How to Troubleshoot Problems that Occur When You Start Word
https://support.microsoft.com/help/921541/how-t...
Does it happen if you open Word in Safe mode?
https://support.office.com/article/Open-Office-...
Safe mode is not a way to regularly use Word, but it is a valuable diagnostic step. If your problem goes away when you use Safe mode, we can walk you through other steps that may help eliminate the problem. Please write back.
If it works in Safe mode, you may want to look at the following while waiting for more information from me or here on the forum.
http://www.addbalance.com/word/addins.htm
This link is to a page on my website. It is safe. I am providing it because I think it contains information that will help you. However, as an Independent Advisor I am required to add the following when posting here with a link to any non-Microsoft site:
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
I hope this information helps.
Please let me know if you have any more questions or require further help.
You can ask for more help by replying to this post (Reply button below).
Stay well