There is no indication whatsoever as to what it is referring to...........
In that case you'll need to use a tool to identify what's launching that dialogue box:
Download Microsoft's (free) Process Explorer from here and keep it somewhere safe.
The next time that pesky box appears, launch Process Explorer then arrange the two windows so that they're side-by-side. Next, drag the little target button from PE's toolbar and drop it on the dialogue box window. The process that launched that window will be highlighted in light blue. The process name and its description should tell you what you need to know. You can then decide whether it's something that needs updating or removing.