This is the software https://www.metatrader5.com/en/download
When you open MetaEditor (F4 or Service - MetaEditor) and try to type anything that opens a tip suggestion by that software, Listary window appears. Open any existing indicator from the left panel, or create a new empty one, and try typing anywhere
to name just a few.
Listary window will pop up.
I know I can turn off this software in Listary settings, but I don’t really want it. Also, similar bug may affect other programs.
Here is a screenshot: