Pop Ups that disappear
 

so on my computer, pop ups show up every often but then disappear immediately. any idea what this is and how to fix it?

You sure you haven't installed any search engines or adware accidentally on your computer?

It's Office 2016, fix is in the article:

https://www.ghacks.net/2017/05/30/wh...-split-second/

Thank you! I hope this fixes the problem.