I ran my normal scripts and began filling up the scratch disk with multiple 67GB files (which it shouldn't do, usually theres's one the entire time). Then I assigned f8 to purge, and ran the script you linked to to see if it did anthing. It did it's thing but the temp files stayed and one got bigger.
With held Ctrl?
It's Ctrl+F8, I just forgot to type it in my reply up there. So - I have an update. I tried it on my local machine (as opposed to a server I tried it on earlier) and it seemed to work... although I wouldn't want the popups of checking file size and all that. Is there a smaller version of the script that wouldn't ask me questions, just run?
Update again: I think it's working now. I commented out the 'alerts' in the script. I don't know if I should be commenting out anything else but it's working so far. Part of the original java script I was working with calls an action from photoshop. I added the running of the new purging script to that action, so I don't have to modify my java script files to do the purge. (good, because there are hundreds).
I have no idea if it is going to work to a server as opposed to local machine.
I wouldn't say it's up to Windows update, but the changed interaction of Photoshop with itself. For example in CS6 it was possible to paint on canvas smoothly when using non-accelerated Action mode, while in CC releases it let you seen the result, after each chunk of set time.