Is your feature request related to a problem? Please describe.

The updatable add-ons window, doesn't appear the first time until a couple minutes after NVDA starts. That gives you just enough time to start doing something, and then have the window appear and interrupt you.

At first I didn't think this was much of a problem. After all, Add-on Updater has done the same thing for years.
But after considering it, I realize that Add-on Updater's window, appears immediately upon NVDA start. You don't have time to get into something else, and then have the updates window appear and disrupt your workflow. Therefore, it doesn't come off as nearly so obtrusive.

That aside, there is another issue. The Available Updates window appears, takes focus, and doesn't make it obvious that whatever you were doing, you aren't doing any more. So for a few seconds at least, if you were rapidly typing or the like, you'll still be doing that, but into the updates window.

Describe the solution you'd like

1. Run the initial updates check, as soon as NVDA starts--as soon as practical, not after a two minute delay.
2. Play a sound, or at least use the Windows alert sound, to signal the user that some kind of notification or window has appeared. It will not be perfect, but it is better than silently steeling focus. This is mostly to be useful when NVDA has been running for 24 hours, and the Available Updates window is appearing again, not after first appearing when starting NVDA.

Describe alternatives you've considered

Additional context

This is essentially the same issue as #17037, filed by @cyrmax. However the proposed solutions here are different, and irrespective of whether a toast notification mechanism is eventually implemented.