I joined Science Fiction/Fantasy (SFF) in 2011. For many years I had an app running - an app I found on the site - that would create a pop-up whenever a Harry Potter question was asked. It would pop up on my desktop, notifying me immediately that a new HP question had been posted. It didn't require an RSS reader or that I look through my email. It just popped up on top of whatever I was working on, on my computer screen. When I got a new computer, I went to install the pop-up app, but I couldn't find it, and I haven't been able to find it since.
I want to be clear that I am looking for a desktop pop-up app, not an RSS or email app. Is there any pop-up program I can use for SFF questions available that you know of? If so, where would I find it?