Proceed seems to be the wrong verb here, as that dialog looks like it appeared after clicking a cancel button, and if I don't want to cancel I "return" to the previous screen where my data still is and don't "proceed" to somewhere.
Clear as mud, right?
I bought a couple of bags of just two keys. Red panic buttons "Panic", and, "Any" keys.
We replaced the escape key cap with those when we sold new systems.
The "Any" key was a big hit and quite popular with the n00bs back in those AT (286) days.
I think I may still have a few of those around lolz.