Thanks_Tom_394. I'll take a look at naps2.
For what it's worth, I think that the slow loading of the HP Scan software is related to the bad Win11 driver, as opposed to HP Scan itself. I got access to a Win10 machine and the same HP Scan software version works just fine (with quicker load time) with my new scanner.
Another oddity of the whole Win11/Scanner issue: even when I am able to get Win11 to recognize the Scanner (which takes lots of monkeying around), the slow-loading HP Scan software never loads its OCR module at all.
I've heard that the 24H2 update for Win11 is loaded with bugs, and is responsible for the problem we are experiencing. I don't know if HP is going to come out with a fix on their own, or whether MSFT has to provide the fix, but there are reports of this issue online that date back to November (when 24H2 was released), so hopefully a solution is coming soon.
In the meantime, I'm giving more thought to ditching Microsoft altogether and just getting Macs for my business.